Q. No. 16 to 17 carry 5 marks each.Q1. Multiple choice questions:(0)(ii)The number of molecules in 32 g of methane is:(a) 3.0x1023(b) 12.04x1023(c) 6.02x1023 (d) 2.4x1023A solution is prepared by dissolving 4g of NaOH in distilled water to give200ml of solution. Molarity of solution is:(a) 0.5M(b) 0,1M (C) 0.25M(d) 0.2MThe pair of ions having same electronic configuration is:(a) Cr+3 Fe+3 (b)Fe+3, Mn+2 (c) Fe+3,Co+3 (d) Sc+3,Crt3(iv) The electronic configuration of the outermost shell of the most electronegativeelement is:(a) 2s22p5 (b) 3s23p5(c) 4s24p5(d) 5s25p5(v)Which electronic configuration corresponds to the highest ionization enthalpy(a) [Ne]3s23p1 (b) [Ne]3s23p2 (c) (Ne]3s23p3 (d) [Ne] 3s23p4(vi) Which of the following angle corresponds to sp?hybridisation:(a) 90°(b) 120°(c) 180°(d) 109°(vii) The isotope of hydrogen present in heavy water is(a) Protium (b) Deuterium (c) Tritium (d) Any one of these(viii) A mixture of CO and He is called:(a) Syn gas(b) Producer gas (c) Laughing gas (d) Industial gas(ix) Whích hydride out of the following does not exist:(a) NH3(b) H2S(c) PH3 (d) PH5Water has maximum density at(a) 6°C(b) 4°C(c) 8°C(d) 2°C(xi) All alkali metals exhibit an oxidation state of:(a) +1(b) +2(C) +3(d) -1(xii)The general electronic configuration of alkaline earth metals is:(a)[Noble gas]ns(b)[Noble gas]ns?np(c)(Noble gas]ns?np2(d) [Noble gas]ns?​

household. Few husbands ever dreamt of washing up, preparing breakfast or tending the

baby. Such duties were no concern of theirs. And normal school boy assumed that if help

were needed in the home, his sisters would be called on to give it. The whole family

supported the view that the male child would not or should not clean, mend, wash, cook

or make beds.

Things are very different today. Doctors or barristers find noting shameful in

putting on an apron to help in the kitchen or nursery and even boast of being good at

washing of clothes and personal linen. The school boy is more often now than formerly

expected to help his mother. One reason for the change is the shortage of domestic

servants. Girls could once be found to do the hard work in middle and upper class homes

for very moderate wages. Such girls nowadays work in factories. They earn more money

than most house holders can afford to pay. Thus the wife now does the household work

herself with the aid of labour saving machines; and she exphousehold. Few husbands ever dreamt of washing up, preparing breakfast or tending the

baby. Such duties were no concern of theirs. And normal school boy assumed that if help

were needed in the home, his sisters would be called on to give it. The whole family

supported the view that the male child would not or should not clean, mend, wash, cook

or make beds.

Things are very different today. Doctors or barristers find noting shameful in

putting on an apron to help in the kitchen or nursery and even boast of being good at

washing of clothes and personal linen. The school boy is more often now than formerly

expected to help his mother. One reason for the change is the shortage of domestic

servants. Girls could once be found to do the hard work in middle and upper class homes

for very moderate wages. Such girls nowadays work in factories. They earn more money

than most house holders can afford to pay. Thus the wife now does the household work

herself with the aid of labour saving machines; and she exp