Which of the following element have larger size?

The acid present in the sting of bees is :

The process of formation of ions from the molecules is called :

If empirical formula of an organic compound is CH2O, and molecular mass is 180 then its molecular formula can be:

Metals lose electrons during ionization - this change is called

An atom having two valence electrons

pH of household ammonia is

During electrorefining impurities collect near which electrode

The capacity of an atom to attract the shared pair of electrons towards itself is called

2 g of oxygen contains number of atoms equal to that in

Which of the following is a common characteristic of a covalent compound?

Which of the following remains unchanged on descending a group in the periodic table?

A bond formed by sharing of electrons :

The type of bonding present in the hydrogen molecule is 

If the empirical formula of a compound is CH and it has a vapour density of 13, find the molecular formula of the compound,

A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is:

Caustic soda on warming with zinc liberates the gas

A metal hydroxide which possesses pale blue colour is 

Process of separation of ions present in an ionic compound

Milk of magnesia is

The elements in the periodic table are placed in the ............ order of their atomic number.

On the basis of electronic configuration the period and group of ₈O¹⁶ is :

The metallic electrode which does not take part in an electrolytic reaction:

An insoluble salt prepared by synthesis is ................

The method used for preparation of iron (II) chloride is :

Molten lead bromide is electrolysed using graphic electrodes. The bromide anions :

While moving down in group II, the melting points of elements gradually, 

Amongst Cs, Na, Li, Rb, K the least reactive metal is :

A gaseous hydrocarbon has V.D. 29 and contains 17.24% of hydrogen. The empirical formula of hydrocarbon is : [C = 12, H = 1]

A compound contains 4.8% of carbon and 95.2% of bromine. The empirical formula of compound is : [C=12, H = 1]