List of practice Questions

A hockey player hits a ball with an impulse of 15 Ns. If time of hit is 0.2 s, the average force exerted by the player on the ball is
If the position of the particle as a function of time \( t \) is \( \vec{r} = 8t \hat{i} + 3t^2 \hat{j} + 3 \hat{k} \, \text{m} \), then the acceleration of the particle is (in \( \text{m/s}^2 \))
The force acting on the particle of 0.2 kg mass whose displacement is described by the equation \( x = 3t + 7t^2 \, \text{m} \)
A bullet of 10 g mass is fired at a speed of 50 m/s by a gun of 2 kg mass. The recoil speed of the gun (in m/s) is
The work done to lift a 60 kg mass to a height of 5 m from the ground is (g = 10 m/s\(^2\))
Energy equivalent of mass 0.5 kg is
Three particles of equal mass lie at distances of 1 cm, 2 cm, and 3 cm from the origin. The distance of their center of mass from the origin is
The number of moles of alkyl halides required to convert primary amine into quaternary ammonium salt is
The order of boiling point of the following amines is (i) Butan-1-amine
(ii) N-Ethylethanamine
(iii) N,N-Dimethylethanamine
An aromatic compound (X) of molecular formula, C7H7Cl, on ammonolysis gives Y (Molecular formula, C7H9N). The compound Y reacts with two moles of CH3Cl gives N, N-Dimethylphenylmethanamine. The compounds 'X' and 'Y' are
Oxidation of gluconic acid with nitric acid gives
The dimensions of \( \frac{B}{E} \) are (B: Magnetic induction, E: Electric field intensity)
Which of the following is not a chiral molecule?
Which of the following oxidizing agent is used for the iodination of methane?
The product obtained on ozonolysis of 3-Ethylpent-2-ene are
The temperature and pressure required for reforming benzene from n-hexane is
The percentage of Cr(III) in Ruby is
Which of the following is an outer orbital complex?
On complete combustion of 0.96 g of an organic compound, 0.88 g of carbon dioxide and 0.1 g of water are produced. What is the percentage composition of carbon in the compound?
The most common oxidation states of chromium are
What is the magnetic moment of a divalent ion with three unpaired electrons?
The bond angle of Cr-O-Cr bond in dichromate ion is
Which of the following transition metal oxide is used in dry battery cells?
The first and second ionization enthalpies of lanthanoids are comparable with the element
Which of the following molecules has the highest standard enthalpy change of fusion (\( \Delta_{fus}H^\circ \)) (in kJ mol\(^{-1}\))?