Question

e. One mole of compound contains Une 010
weight of the compound is.
i. 3
ii. 12 iii. 32
iv. 44
(5)
B. Give one word or phrase for the following for the following statements.
1. The tendency of an atom in a molecule to attract shared pair of electrons towards itself.
2. The phenomenon by which certain substance absorbs moisture from the atmosphere without
dissolving in it.
3. An electrolytic cell which consists of three layers of molten substances differing in the specific
gravity
4. An organic compound which shows an abrupt change in the colour with acidic or basic solution.
5. Removal of carbon dioxide by heating a carbonic acid.
C. Write the balanced chemical equation for each of the following.
(5)
1. Lead sulphate from lead carbonate.
2. Sodium sulphate using dilute sulphuric aid.
3. Copper chloride using copper carbonate.
.
4. Calciun bicarbonate reacts with dilute hydrochloric acid.
5. Lead nitrate solution is added to sodium chloride solution.
D. Match the salts given in column ‘A’ with the method of prepration in column 'B'. (5)
Column 'A'
Column 'B'
a. pb(NO3)2 from pbo
1. simple displacement
b. mgclz from Mg
2. Titration.
c. Feclz from Fe
3. Neutralisation
d. NaNo3 from NaOH
4. precipitation
e. ZnCoz from ZnSO4
5. Combination
E. Fill in the blanks.
(5)
1. In a electrolytic cell, energy is consumed. (mechanical / electrical)
2. The conductivity of an electrolyte with rise in temperature. ( decreases | increases)
3. Two chlorine atoms combine to form a molecule the bond between them is (ionic /
covelent)
1​

Answer 1

Answer:

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