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11.

Synthesis of each molecule of glucose is photosynthesis  involves


A) 18 molecules of ATP

B) 10 molecules of ATP

C) 8 molecules of ATP

D) 6 molecules of ATP



12.

Which of the following exists as covalent crystals in the solid-state


A) Iodine

B) silicon

C) sulphur

D) phosphrous



13.

In which of the following pairs of molecules/ions both the species are not likely to exist?


A) $H_{2}^{+},He_{2}^{2-}$

B) $H_{2}^{-},He_{2}^{2-}$

C) $H_{2}^{2+},He_{2}^{}$

D) $H_{2}^{-},He_{2}^{2+}$



14.

A gaseous hydrocarbon gives upon combustion 0.72 g of water and 3.08 g of CO2. The empirical formula of the hydrocarbon is 


A) $C_{2}H_{4}$

B) $C_{3}H_{4}$

C) $C_{6}H_{5}$

D) $C_{7}H_{8}$



15.

Which of the following is the wrong statement?


A) ONCl and ONO- are not isoelectric

B) $O_{3}$ molecule is bent

C) Ozone is violet -black in solid state

D) Ozone is diamagnetic gas

E) None of these



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