Explain why inspite of nearly the same electronegativity, oxygen forms hydrogen bonding while chlorine does riot.

The molecular weight of oxygen gas (02) is 32 while that of hydrogen gas (H2) is 2. Prove that under the same physical conditions, the velocity of sound in hydrogen is four times that in oxygen.

Explain the following: How is the mehotd of extraction of metlas high up in the reactivity series different form that for metals in the middle?Why the same process cannot be applied for them? Explaining by giving equaiton,the extraction sodium.

Select the appropriate option and complete the following paragraph. (single, double, hydrocarbons, C_(2)H_(4), C_(2)H_(6), CHCl_(3), CH_(3)Cl, methane, ethane) Carbon compounds contain carbon and hydrogen as the only two elements are called __________. The smallest hydrocarbon is ________. Another hydrocarbon is ___________with molecular formula __________. In both these hydrocarbons, the valencies of all the atoms are satisfied by the _________ bonds. If one hydrogen atom of methane is replaced by another monovalent element chlorine, then a new carbon compounds is formed. The molecular formula of this compound is ___________.

Oxygen forms OF_2 with fluorine while sulfur forms SF_6 . Explain why?

In addition topeptidebond,aminoacids are linked by..... bonds form between oxygen of one amide group and hydrogen of another amide group.

Some varieties of wheat are known as spring wheat while others are called winter wheat Former variety is sown, and planted in spring and It is harvested by the end of the same season. However, winter varieties, if planted in spring, fail to flower or produce mature grains within aspan of a flowering season. Explain, why? Mineral nutrition.

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. Why do you think setting of curd occur at different rates during different seasons?

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. The reaction of aluminum metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference?

Answer the following questions: Two samples 'm' and 'n' of slaked lime were obtained form two different reactions. The details about their compostion are as follows: 'Sample m' mass: 7g Mass of constituent oxygen: 2g Mass of constituent calcium :5g 'sample n' mass: 1.4g Mass of consittuent oxygen: 0.4 Mass of constituent calcium : 1.0g Which law of chemical combination does this prove ? Explain.