Q.1 Melting point of water is higher than petrol, because intermolecular forces in water are:
A) Weaker than petrol C) Same as in petrol
B) Stronger than petrol D) Negligible
Q.2 DNA molecule is double stranded, in which two chains of DNA are twisted around each other by:
A) Hydrogen bonds C) Covalent bonds
B) Vander Waal's force D) Dative bonds
A) Weaker than petrol C) Same as in petrol
B) Stronger than petrol D) Negligible
Q.2 DNA molecule is double stranded, in which two chains of DNA are twisted around each other by:
A) Hydrogen bonds C) Covalent bonds
B) Vander Waal's force D) Dative bonds
Q.3 The number of molecules in 22.4 dm3 of H2 gas at 0 °C and 1 atm are
A) 60.2 x 1023 C) 6.02 x 1025
B) 6.02 x 1022 D) 6.02 x 1022
Q.4 Correct order of boiling points of the given liquid is
A) H2O > HF > HCl > NH3 C) H2O > HF > NH3 > HCl
B) HF > H2O > HCl > NH3 D) HF > H2O > NH3 > HCl
A) 60.2 x 1023 C) 6.02 x 1025
B) 6.02 x 1022 D) 6.02 x 1022
Q.4 Correct order of boiling points of the given liquid is
A) H2O > HF > HCl > NH3 C) H2O > HF > NH3 > HCl
B) HF > H2O > HCl > NH3 D) HF > H2O > NH3 > HCl
Q.5 The coordination number of Na+ in NaCl crystal is:
A) 6 C) 4
B) 2 D) 8
A) 6 C) 4
B) 2 D) 8
Q.6 There are four gases H2, He, N2 and CO2 at 0 °C. Which gas shows greater non-ideal behavior?
A) He C) H2
B) CO2 D) N2
A) He C) H2
B) CO2 D) N2