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# 1.Hydrolysis of sodium acetate gives :acidic solution basic solution amphoteric solution neutral solution

B.

basic solution

Sodium acetate is a salt of weak acid and strong base hence its aquous solution is basic .

C-H3CONa$\stackrel{{\mathrm{H}}_{2}\mathrm{O}}{⇌}$$\underset{\mathrm{Weak}}{{\mathrm{CH}}_{3}\mathrm{COOH}}$+$\underset{\mathrm{Strong}}{\mathrm{NaOH}}$

2.

Cationic hydrolysis gives the followingsolution :

• acidic

• basic

• neutral

• amphoteric

B.

basic

Cationic hydrolysis always forms basicsolution .

3.

Number of electrons surrounding Kr in KrF2 is :

• 10

• 6

• 4

• 8

A.

10

Total no. of electron which are foundaround , Kr in KrF2 are 10 .

4.

Isotopic pair is :

• 20X4021X40

• 20X40 , 20X41

• 40X2041X20

• None

B.

20X40 , 20X41

Isotopes are the atoms of an element which have same atomic number but different mass number .

5.

H - I - O bond angle in H2O2 :

• 90o

• 180o

• 109.5o

• 94.8o

D.

94.8o

The bond angle of H2O2 is 94.8o .

6.

Electron deficient molecule is :

• CCl4

• PCl5

• BF3

• SF6

C.

BF3

Structure of BF3 is ;

In this example octet is incomplete .

7.

Hybridization present in ClF3 is :

• sp2

• sp3

• dsp2

• sp3d

D.

sp3d

In ClF3 molecule , Cl atom is sp3dhybridised and due to the presence oftwo lone pairs of electrons , it hasT-shaped geometry .

8.

Atomic number of an element is equal tothe number of :

• protons

• neutrons

• electrons

• protons + neutrons

D.

protons + neutrons

Atomic number of an element is alwaysequal to the number of protons in itsatom while mass number is equal to thesum of the number of protons andneutrons .

9.

Which has smallest size ?

• Na+

• Mg2+

• Ne

• O2-

B.

Mg2+

Among isoelectronic species , sizedecreases with increase in nuclearcharge .Hence , the order of size is_

Mg2+ < Na+ < O2-

10.

Which is the correct relation for diffusionof gases :

• $\propto$ d

• $\propto$ $\sqrt{\mathrm{d}}$

• $\propto$ $\frac{1}{\sqrt{\mathrm{d}}}$

• none of these

C.

$\propto$ $\frac{1}{\sqrt{\mathrm{d}}}$

According to Graham for an ideal gas ,

r$\propto$$\frac{1}{\sqrt{\mathrm{d}}}$