List of practice Questions

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : Opioids are drugs derived from Papaver somniferum. 

Reason (R) : Opioids slow down metabolism and produce hallucinations.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : When a cyclist doubles his speed of turning, the chance of his skidding becomes nearly four times. 

Reason (R) : When the speed of the vehicle increases, the angle of bending also increases.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A): A cloth covers a table. Some dishes are kept on it The cloth can be pulled out without dislodging the dishes from the table. 

Reason (R): For every action there is an equal and opposite reaction.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A): Frictional forces are conservative forces. 

Reason (R): Potential energy can be associated with frictional forces.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : A person standing on a rotating platform suddenly stretched his arms. The platform slows down. 

Reason (R) : This happens as angular momentum is conserved.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : For a system of particles under central force field, the total angular momentum is conserved. 

Reason (R) : The torque acting on such a system is zero.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : \(ZrI_4\) is useful in purification of zirconium (Zr). 

Reason : \(ZrI_4\) sublimise at room temperature.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : tert-Butyl amine can be formed by Gabriel phthalimide synthesis. 

Reason : It follows \(SN_1\) mechanism.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : \(m\)-Bromotoluene can be prepared from \(m\)-toluidine. 

Reason : Amino group is \(meta\)-directing.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : Two sugar units are joined by 1,2-glycosidic bond in sucralose. 

Reason : Sucralose contains \(C_1\) -glucose and \(C_2\) - fructose glycosidic bond.

In the light of the above statements, choose the correct answer from the options given below
 

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : Glyceraldehyde reacts with \(Br_2/ H_2O\) to form achiral compound. 

Reason : \(-CHO\) and \(-CH_2OH\) both are oxidised.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : Lyophilic colloid protects lyophobic colloid. 

Reason : Lyophilic colloid particles cover up the particles of the lyophobic colloid.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: \((CH_3)_2NH\) is less basic than \((CH_3)_3N\) in aqueous solution. 

Reason : Hyperconjugation in \((CH_3)_2NH\) is more than that in \((CH_3)_3N\).

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion : tert-Butyl methyl ether reacts with \(HBr\) to form fert-butyl bromide and methanol. 

Reason : It follows \(S_N1\) mechanism.

In the light of the above statements, choose the correct answer from the options given below

A hammer of mass $200\, kg$ strikes a steel block of mass $200\, g$ with a velocity $8\, ms^{-1}$. If $23\%$ of the energy is utilized to heat the steel block, the rise in temperature of the block is (specific heat capacity of steel = $460 \; J \; kg^{-1} \; K^{-1}$)
An achromatic combination of lens is formed by joining
The resolving power of telescope can be increased by
The following graph shows how $(t_{1/2})$ a (half life) of a reactant R changes with the initial reactant concentration $a_0$. The order of the reaction will be
Which of the following is the correct IUPAC name of the following structure
Consider a driven damped mechanical oscillator is in resonance. Which of the following statements is true?
A metal surface of work function 3 eV is illuminated by photons of energy 2 eV. The kinetic energy of emitted photo-electrons will be
Two coherent monochromatic light beams of intensities ratio 1 : 4 are superposed. The ratio of maximum and minimum intensities in the resulting beam will be
Lenz?s law is consequence of the law of conservation of
Kelvin equation is related to
0.2 moles of an ideal gas is taken round the cycle ABC as shown in the figure. The path B ? C is an adiabatic process, A ? B is an isochoric process and C ? A is an isobaric process. The temerature at A and B are TA = 300 K and TB = 500 K and pressure at A is 1 atm and volume at A is 4.9 L. The volume at C is (Given : $\gamma=\frac{Cp}{C_{V}}=\frac{5}{3}, R = 8.205 ? 10^{-2}$ L atm mol$^{-1}$ $K^{-1}, \left(\frac{3}{2}\right)^{^{2/5}} =0.81$