Which of the following is not correctly matched?

Tendons connects muscle to bone and ligaments connects bone to bone

Cartilage – Limbs and hands in adults

Blood – Fluid connective tissue

The correct Option is "Tendons – Connects bone to bone"

Adipose tissue – Blubber of whales

Which of the following is not correct for rods? I. Twilight vision is the function of the rods II. It is responsible for daylight vision sometimes III. The rods contain a protein called rhodopsin IV. Rods are photoreceptor cells Choose the correct option

Rod cells are responsible for night or twilight vision only. Both (a) and (b), i.e., cones and rods

The correct Option is "Only II"

Which of the following is not correctly matched?

Medulla oblongata contains centre for the control of heart beat, respiration, digestion, blood pressure, gut peristalsis, swallowing of food, secretion of gland, involuntary function, i.e., vomiting, coughing, vasoconstrictor, vasodilator, sneezing, hiccuping, etc., medulla oblongata is not the centre for temperature regulation, it is controlled by ‘hypothalamus’.

The correct Option is "Medulla oblongata-Temperature regulation"

If ${\rm{\vec A}} = {\rm{\vec B}},$ then which of the following is not correct

$\hat A.\hat B = \left( 1 \right)\left( 1 \right){\rm{cos}}0^\circ = 1 \ne AB$

The correct Option is "$\hat A.\hat B = {\rm{AB}}$"

$\left| {{\rm{\vec A}}} \right| = \left| {{\rm{\vec B}}} \right|$

${\rm{A\hat B}}\left| {\rm{\;}} \right|{\rm{\;B\hat A}}$

Which of the following is not correct regarding the properties of ionic compounds?

Ionic compounds are good conductor of electricity in molten or in solution state. However, they are bad-conductor in solid state.

Ionic compounds have high metling and boiling points

Their reaction velocity in aqueous medium is very high

The correct Option is "Ionic compounds in their molten and aqueous solutions do not conduct electricity"

They are highly soluble in polar solvents

Which of the following is not correct for gasrtulation?

Gasrtulation is characterized by the presence of archenteron, three germinal layers (ectoderm, mesoderm, and endoderm) and morphogenetic movements.

The correct Option is "Some blastomeres and blastocoel degenerate"

Which of the following is not correct with respect to bond length of the species?

$\begin{array}{l} {{\rm{O}}_2} < {\rm{O}}_2^ - \\ Bond\,order\\ {{\rm{C}}_2} = 2\\ {\rm{C}}_2^{2 - } = 3\\ {{\rm{B}}_2} = 2\\ {\rm{B}}_2^ + = 1.5\\ {\rm{L}}{{\rm{i}}_2} = 1\\ {\rm{Li}}_2^ + = 0.5\\ {{\rm{N}}_2} = 3\\ {\rm{N}}_2^ + = 2.5\\ {{\rm{O}}_2} = 2\\ {\rm{O}}_2^ - = 1.5 \end{array}$

${{\rm{C}}_2} > {\rm{C}}_2^{2 - }$

${\rm{Li}}_2^ + > {\rm{L}}{{\rm{i}}_2}$

The correct Option is "${{\rm{O}}_2} > {\rm{O}}_2^ - $"

Which of the following is not correct

Lithium does not form peroxides

The correct Option is "$2\,\,{\rm{L}}{{\rm{i}}_{\rm{2}}}{\rm{O}}\xrightarrow[{{\rm{673K}}}]{{{\rm{heat}}}}{\rm{L}}{{\rm{i}}_{\rm{2}}}{{\rm{O}}_2} + 2{\rm{Li}}$"

$2\,\,{{\rm{K}}_{\rm{2}}}{\rm{O}}\xrightarrow[{{\rm{673K}}}]{{{\rm{heat}}}}{{\rm{K}}_{\rm{2}}}{{\rm{O}}_2} + 2K$

${\rm{2}}\,\,{\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{O}}\xrightarrow[{{\rm{673K}}}]{{{\rm{heat}}}}{\rm{N}}{{\rm{a}}_{\rm{2}}}{{\rm{O}}_{\rm{2}}}{\rm{ + 2Na}}$

${\rm{2}}\,\,{\rm{R}}{{\rm{b}}_{\rm{2}}}{\rm{O}}\xrightarrow[{{\rm{673K}}}]{{{\rm{heat}}}}{\rm{R}}{{\rm{b}}_{\rm{2}}}{{\rm{O}}_{\rm{2}}}{\rm{ + 2Rb}}$

Which of the following is not correct?

$2{\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3} + {{\rm{I}}_2} \to {\rm{N}}{{\rm{a}}_2}{{\rm{S}}_4}{{\rm{O}}_6} + 2{\rm{NaI}}$ sodium thiosulphate sodium tetrathionate

Iodine oxidises sodium thiosulphate to sodium tetrathionate.

Sodium thiosulphate is soluble in water.

Ozone is used to identify the presence of unsaturation in alkenes.

The correct Option is "Sodium thiosulphate reacts with iodine to form sodium sulphate."

Which of the following is not correct for the allotropic forms of carbon

Diamond is diamagnetic as there is no unpaired electron.

${C_{60}}$ molecule has a shape like soccer ball and called Buckminster fullerene

Graphite is thermodynamically most stable allotropic form of carbon

Graphite fibres embedded in plastic material form high strength, lightweight composites

The correct Option is "In diamond each carbon atom undergoes $S{P^3}$ hybridisation and is paramagnetic."

Which of the following is not correct?

The unit of electrochemical equivalent (Z) is g/C. $w = Z.i.t$ $\therefore Z = \frac{w}{{i.t}}{\rm{g}}/C$

Aqueous solution of NaCl is an electrolyte.

The correct Option is "The units of electrochemical equivalent are g-coulomb."

In the Nernst equation, n represents the number of electrons transferred in the electrode reaction.

Standard reduction potential of hydrogen electrode is zero volt.

$2{N_2}{O_5}\;\leftrightharpoons\;4N{O_2} + {O_2}$ For the above reaction which of the following is not correct above rates of reaction?

$2{N_2}{O_5}\;\leftrightharpoons\;4N{O_2} + {O_2}$ $Rate = \pm \frac{1}{{\begin{array}{*{20}{c}} {stoichiometrics}\\ {coefficient} \end{array}}}\frac{{d\;product\;or\;reactant}}{{dt}}$ $\therefore Rate = \frac{{ - 1}}{2}\frac{{d\left[ {{N_2}{O_5}} \right]}}{{dt}} = + \frac{1}{4}\frac{{d\left[ {N{O_2}} \right]}}{{dt}} = \frac{{d\left[ {{O_2}} \right]}}{{dt}}$ $Or\; - \frac{{d\left[ {{N_2}{O_5}} \right]}}{{dt}} = 2\frac{{d\left[ {{O_2}} \right]}}{{dt}}$ $Or\;\frac{{ - 2d\left[ {{N_2}{O_5}} \right]}}{{dt}} = 4\frac{{d\left[ {N{O_2}} \right]}}{{dt}}$ $Or\;\frac{{d\left[ {N{O_2}} \right]}}{{dt}} = \frac{{4d\left[ {{O_2}} \right]}}{{dt}}$

$\frac{{ - d\left[ {{N_2}{O_5}} \right]}}{{dt}} = 2\frac{{d\left[ {{O_2}} \right]}}{{dt}}$

$\frac{{ - 2d\left[ {{N_2}{O_5}} \right]}}{{dt}} = \frac{{d\left[ {N{O_2}} \right]}}{{dt}}$

$\frac{{d\left[ {N{O_5}} \right]}}{{dt}} = 4\frac{{d\left[ {{O_2}} \right]}}{{dt}}$

The correct Option is "$\frac{{ - 2d\left[ {{N_2}{O_5}} \right]}}{{dt}} = 4\frac{{d\left[ {N{O_2}} \right]}}{{dt}} = \frac{{d\left[ {{O_2}} \right]}}{{dt}}$"

Which of the following is not correct regarding the ratio telescope

Radio waves can pass through dust, clouds, fog, etc, in a radio, telescope. It can detect very faint radio signal due to enormous size of its reflection. So it can be used at night and even in cloudy weather

The correct Option is "It can not work at night"

It can detect a very faint radio signal

It can be operated even in cloudy weather

It is much cheaper than optical telescope

Which of the following is not correct regarding the electrolytic preparation of ${{\rm{H}}_2}{{\rm{O}}_2}?$

${{\rm{H}}_2}{{\rm{O}}_2}$ can be prepared by electrolysis of ${\rm{50\% }}$ ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$. In this method, hydrogen is liberated at cathode. ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}\;\leftrightharpoons\;2{{\rm{H}}^ + } + 2{\rm{HSO}}_4^ - $ At anode : $2{\rm{HS}}{{\rm{O}}_4} \to {{\rm{H}}_2}{{\rm{S}}_2}{{\rm{O}}_8} + 2{e^ - }$ ${{\rm{H}}_2}{{\rm{S}}_2}{{\rm{O}}_8} + 2{{\rm{H}}_2}{\rm{O}} \to 2{{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4} + {{\rm{H}}_2}{{\rm{O}}_2}$ At cathode : $2{{\rm{H}}^ + } + 2{e^ - } \to {{\rm{H}}_2} \uparrow $

${\rm{50\% }}\;{{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}\;$ is used

The correct Option is "Hydrogen is liberated at anode"

Sulphuric acid undergoes oxidation

Which of the following is not correct?

Physical adsorption decreases with increase in temperature, whereas chemisorptions first increase and then decreases with increase in temperature.

Enthalpy of physical adsorption is less compared to enthalpy of chemical adsorption

The correct Option is "Physical adsorption increases with the increase in temperature"

Which of the following is not correct?

Milk is a naturally occurring emulsion

The correct Option is "Gold sol is a lyophilic sol"

Physical adsorption decreases with rise in temperature

Chemical adsorption is unilayered

Which of the following is not correct about carbon monoxide ?

The carboxyhaemoglobin is about ${\rm{300}}$ times more stable than oxyhaemoglobin.

It reduces oxygen carrying ability of blood.

The correct Option is "The carboxyhaemoglobin (haemoglobin bound to ${\rm{CO}}$) is less stable than oxyhaemoglobin."

It is produced due to incomplete combustion.

Which of the following is not correct?

Aniline undergoes diazotisation.

Ethylamine and aniline both have ${\rm{N}}{{\rm{H}}_2}$ group

Ethylamine and aniline both dissolve ${\rm{HCl}}$

Ethylamine and aniline both react with ${\rm{CHC}}{{\rm{l}}_3}$ and ${\rm{KOH}}$ to form unpleasant smell

The correct Option is "Ethylamine and aniline both react with ${\rm{NaN}}{{\rm{O}}_2} + {\rm{HCl}}$ to give hydroxyl compounds in cold"

Which of the following is not correct about transition metals?

Transition metals can form ionic or covalent compounds and their melting and boiling points are high. Their compounds are generally coloured and they usually exhibit variable valency.

Their compounds are generally coloured.

They can form ionic or covalent compounds.

Their melting and boiling points are high.

The correct Option is "They do not exhibit variable valency."

Which of the following is not correct?

The formation of ozone from oxygen is an endothermic reaction not exothermic reaction. $3{O_2}\xrightarrow[{{\rm{discharge}}}]{{{\rm{Electric}}}}2{O_3};\,\,\,\Delta H = 287\,kJ$ So, statement $3{O_2}\xrightarrow[{{\rm{discharge}}}]{{{\rm{Silent}}}}2{O_3};{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \Delta H = - 284.5\,kJ$ Is not correct statement.

Ozone undergoes addition reaction with unsaturated carbon compounds

Sodium thiosulphate reacts with ${{\rm{I}}_{\rm{2}}}$ to form sodium tetrathionate and sodium iodide.

Ozone oxidises lead sulphide to lead sulphate

Which of the following is not correct

It $\Delta G$ is negative $(< 0)$, the process is spontaneous.

$\Delta G$ is zero for a reversible reaction

The correct Option is "$\Delta G$ is positive for a spontaneous reaction"

$\Delta G$ is negative for a spontaneous reaction

$\Delta G$ is positive for a non – spontaneous reaction

When the oxygen supply to the tissues is inadequate, the condition is

In hypoxia, oxygen supply to the tissue is inadequate.

The correct Option is "Hypoxia"

Which of the following enzyme is not a component of human saliva?

$\alpha $-amylase, lysozyme and lipase are the potent enzymes present in human saliva. $\alpha $-amylase (ptylin) breaks down starch into simpler sugars. Lipase helps in the initiation of fat digestion and lysozymes has antibacterial effects

The correct Option is "None of the above"

Each muscle is made up of long, cylindrical fibres arranged in parallel arrays. These fibres are composed of numerous fine fibrils called

Muscle fibres are composed of numerous fine fibrils called myofibrils. Muscles plays an important role in the movement of the body

The correct Option is "Myofibrils"

The scientific and common names of certain animals are given below. Mark the correct option Scientific name - Common name A. Antedon – Brittle star B. Loligo – Cuttle fish C. Dentalium – Tusk shell D. Euspongia – Bath sponge

Loligo – Squid, Antedon – sealily

A is wrong but B, C and D are correct

The correct Option is "A and B are wrong but C and D are correct"

A and B are correct but C and D are wrong

Arrange the following events in a correct order that lead to the formation of an auditory impulse in human ears from the codes given below I. Vibration is transferred from the malleus to the incus and then to stapes II. Basiliar membrane moves up and down III. Nerve impulse is transmitted by cochlear nerve to auditory cortex of brain for impulse analysis and recognition IV. Sound waves pass through ear canal V. Stereocilia of hair cells of organ of Corti rub against tectorial membrane VI. Sound waves causes ear drum to vibrate VII. Nerve impulse is generated VIII. Vibrations move from fluid of vestibular canal to the fluid tymapanic canal IX. Membrane at oval window vibrates Codes

Mechanism of Hearing Sound waves → Tympanic membrane → Vibrations → Ear ossicles (malleus, incus and stapes). The vibrations are passed through the oval window on to the fluid of counter where they generate waves which travel to Scala vestibuli → Reissner’s membrane → Scala media → Tectorial membrane is vibrated → Tectorial membrane touches the hair cells organ of corti. As a result, nerve impulses are generated in the afferent neurons. These impulses are carried by the afferent nerve fibres through the auditory nerve to the auditory nerve to the cortex in the temporal lobe of the cerebral hemisphere of the brain where the impulses are analysed and the sound is recognised. Ear also performs the function of balancing (equilibrium)

IV, VI, I, IX, VIII, II, V, VII, III

The correct Option is "I, II, III, IV, V, VI, VII, VIII, IX"

IX, VIII, VII, VI, V, IV, III, II, I

IV, VI, I, VIII, IX, II, V, VII, III

Botryoidal tissue is found in

In class-Hirudinea, coelom is greatly reduced by the formation of peculiar connective tissue called botryoidal tissue. It is excretory in function.

The correct Option is "Hirudinea"

Lipid soluble hormone works by interacting with

Intracellular receptors. Steroid hormones are the lipid soluble hormones. They are also categorized as hydrophobic hormones. They directly pass through the cell membrane and interact with intracellular receptors present inside the cell (generally into the nucleus). Generally the steroid hormone is derived from the cholesterol ring

The correct Option is "Intracellular receptors"

Temperature changes in the environment affect most of the animals which are

Poikilothermy (cold bloodedness) is a condition of any animal whose body temperature fluctuates considerably with that of its environment.

The correct Option is "Poikilothermic"

Choose the correct options for the following diagram

A-Thread tube; B-contractile fibril; C-Lasso. The figure is representing the various component of Cnidoblast or cnidocyte, found in animals of phylum-Coelenterata, Cnidocytes/Cnidoblasts contains stinging capsule, which releases the toxin, thus used in the defense mechanism, by the animals belonging to phylum coelenterate