Question

3.
STATE LEVEL PREPARATORY EXAMINATION
March - 2020
X Standard
Sub: Science
Time: 3.15 Hours
Total Marks : 80
I Four alternatives are given for each of the following questions/incomplete
statements. Only one of them is correct. Choose the correct alter
correct alternative
and write the complete answer along with its letter of alphabet: 1x8 = 3
Part of the brain controls the involuntary functions of the body is
a) Medulla in forebrain
b) Medulla in Midbrain
c) Medulla in hind brain
d) Medulla in Spinal cord
A heat producing device should be used in an electrical circuit. This device
should have
a) high resistance and high melting point
b) low resistance and low melting point
c) high resistance and low melting point
d) low resistance and high melting point
An objectata disatnce of +15cm is slowly move towards the pole of a convex
mirror, the image will be
a) shortened and real
b) enlarged and real
c) enlarge and virtual
d) diminished and virtual
4. The values of x, y and z in the following balanced reaction respectively
(x) Pb(NO), → (y) PbO + (z) NO, +0
a) 2, 4, 2 b) 2, 4,4 c) 2, 2,4 d) 4, 2,2
5. Ground water will not be depleted due to
a) Afforestation
b) thermal power plants
c) loss of forest and decreased rainfall
d) cropping of high water demanding crops
6. Ethanol reacts with Sodium metal to form Products are
a) CHONa+H,
b) CHCOONa+H.
c) CHONa+H,
d) CH,COOH + HO
The current flows through the 109 resistor in the following circuit.
a) 1.2A
b) 0.2V
c) 2.0V
d) 0.6V
8. The alcoholic drinks contain
a) CH,OH b) CH.COOH c) CH2COOH, d) CH CH,OH
2022
102
52
HE
6V
WESSKHMS & CPUCPA / State Level - PP/ Mar. 2020 - Science - EM​

Answer 1

Answer:

1. c)medical in hind brain
2. a)high registan ve and high meeting point
3. a)shortened and real
4. c)2,2,4
5. a)Afforestation
6. a)CHONa+H
7. c)2.0V
8. c)CH2COOH