#### 11th Standard Chemistry English Medium Free Online Test Book Back One Mark Questions - Part Three

11th Standard

Reg.No. :
•
•
•
•
•
•

Chemistry

Time : 00:10:00 Hrs
Total Marks : 10

10 x 1 = 10
1. The number of water molecules in a drop of water weighing 0.018 g is ________.

(a)

6.022$\times$1026

(b)

6.022$\times$1023

(c)

6.022$\times$1020

(d)

9.9 $\times$1022

2. Which of the following pairs of d-orbitals will have electron density along the axes ?

(a)

dz2, dxz

(b)

dxz, dyZ

(c)

dz2, dx2-y2

(d)

dxy ,dx2-y2

3. Which of the following elements will have the highest electro negativity ____________

(a)

Chlorine

(b)

Nitrogen

(c)

Cesium

(d)

Fluorine

4. Non-stoichiometric hydrides are formed by _____________

(a)

(b)

carbon, nickel

(c)

manganese, lithium

(d)

nitrogen, chlorine

5. sodium is stored in _____________

(a)

alcohol

(b)

water

(c)

kerosene

(d)

none of these

6. The IUPAC name of the Compound is _____________

(a)

2,3 - Diemethylheptane

(b)

3- Methyl -4- ethyloctane

(c)

5-ethyl -6-methyloctane

(d)

4-Ethyl -3 - methyloctane

7. Homolytic fission of covalent bond leads to the formation of ___________.

(a)

electrophile

(b)

nucleophile

(c)

Carbo cation

(d)

8. The C – H bond and C – C bond in ethane are formed by which of the following types of overlap _________

(a)

sp3 – s and sp3 – sp3

(b)

sp2 – s and sp2 – Sp2

(c)

sp – sp and sp – sp

(d)

p – s and p – p

9. With respect to the position of – Cl in the compound CH3 – CH = CH – CH2 – Cl, it is classified as __________

(a)

Vinyl

(b)

Allyl

(c)

Secondary

(d)

Aralkyl

10. Haemoglobin of the blood forms carboxy haemoglobin with __________.

(a)

Carbon dioxide

(b)

Carbon tetra chloride

(c)

Carbon monoxide

(d)

Carbonic acid