GSEB Class 10 Science 2022 Board Exam paper with Solution
if you are looking for GSEB Class 10 Science 2022 Board Exam paper with Solution then you are at the right place……
Answer the questions 1 to 24 as directed . Each Question carries 1 Mark.
1) Potato chips manufacturers usually flush bags of chips with which inert gas to prevent the chips from getting oxidised?
Options:
(A) Oxygen
(B) Hydrogen
(C) Chlorine
(D) Nitrogen
Correct Answer: (D) Nitrogen
Reason:
Nitrogen is an inert gas that prevents oxidation and keeps chips fresh and crisp by displacing oxygen inside the packet.
2) Butanone is a four-carbon compound with the functional group
Options:
(A) Carboxylic acid
(B) Aldehyde
(C) Ketone
(D) Alcohol
Correct Answer: (C) Ketone
3) Choose the correct option to complete the following reaction
[ 6CO_2 + 12H_2O —–chlorophyll/sunlight______ + 6O_2 + 6H_2O]
Options:
(A) C₂H₅OH
(B) C₆H₁₂O₆
(C) CH₄
(D) CH₃COOH
Correct Answer: (B) C₆H₁₂O₆ (Glucose)
4) Which metal is used for interconnection of cells in solar panel?
Options:
(A) Silver
(B) Copper
(C) Cobalt
(D) Iron
Correct Answer: (B) Copper
5) An object is placed at a distance of 40 cm in front of a plane mirror. What will be the distance between the object and its image?
Options:
(A) 40 cm
(B) 80 cm
(C) 20 cm
(D) 60 cm
Correct Answer: (B) 80 cm
Reason: In a plane mirror, image forms at the same distance behind the mirror as the object is in front. So, distance = 40 + 40 = 80 cm
6)For a person with normal vision, the least distance of distinct vision is approximately:
Options:
(A) 25 m
(B) 2.5 cm
(C) 25 cm
(D) 2.5 m
Correct Answer: (C) 25 cm
7)To convert vegetable oil into vegetable ghee, which catalyst is used?
(Nickel, Calcium, Carbon)
Correct Answer: Nickel
8)Which element has the electronic configuration 2,8,2?
(Aluminium, Magnesium, Sodium)
Correct Answer: Magnesium
9)In the given circuit diagram below, the equivalent resistance is ________.
(Options shown: 1/4 Ω, 1 Ω, 4 Ω)
Given:
R₁ = 2 Ω and R₂ = 2 Ω connected in series
Correct Answer: 4 Ω
Reason:
Equivalent resistance in series = R₁ + R₂ = 2 + 2 = 4 Ω
10)In human somatic (body) cells, the number of pairs of chromosomes is ________.
Correct Answer: 23 pairs
11)Which type of mirror is used in a car headlight?
Correct Answer: Concave mirror
12)The device used to generate electric current is called ________.
Correct Answer: Generator
13)When the pH value of the mouth falls below 5.5, tooth decay starts.
Correct Answer: True
14)Noble gases have seven electrons in their outermost shell.
Correct Answer: False
Reason: Noble gases have 8 electrons in the outermost shell (except helium, which has 2).
15) Vegetative propagation takes place in the buds produced in the notches along the margins of Bryophyllum leaf.
Answer: True
16) Carbon-di-oxide is a green house gas.
Answer: True
17) Solder, an alloy of lead and tin has high melting point.
Answer: False
(Solder has a low melting point.)
18) Abscissic acid is a plant hormone which promotes growth.
Answer: False
(It inhibits growth.)
Answer the following in one word or one sentence:
19) Write the chemical formula of Bleaching powder.
Answer: CaOCl₂
20) The breakdown of pyruvate to give carbon dioxide, water, energy takes place in which organelle?
Answer: Mitochondria
21) I measure the electric current. Which device am I?
Answer: Ammeter
22) Write full form of AC and DC.
Answer:
AC: Alternating Current
DC: Direct Current
23) What are fossil fuels?
Answer: Fuels formed from the remains of dead plants and animals buried under the earth for millions of years.
24) Match the following type of Asexual reproduction with correct examples
Type of Asexual Reproduction → Example
- i) Fragmentation → (c) Spirogyra
- ii) Regeneration → (a) Planaria
SECTION – B
Question No 25-37 each carries 2 marks. Answer in short in 40-50 words approximately. Attempts any 9 questions only.
25) What are isomers? Draw the structural formulas of butane.
Answer:
Isomers are compounds having the same molecular formula but different structural arrangements and properties.
Structural formulas of butane (C₄H₁₀):
n-Butane: CH₃–CH₂–CH₂–CH₃
Isobutane: CH₃–CH(CH₃)–CH₃
26) Write differences between Soaps and Detergents.
Answer:
Soaps are sodium or potassium salts of fatty acids and are ineffective in hard water.
Detergents are synthetic cleaning agents and work well in both soft and hard water.
27) The position of three elements A, B, C in the periodic table is shown.
Answers:
- a) A is: Non-metal
- b) C is: More reactive than A (reactivity of Group 17 increases down the group)
- c) C will be: Larger in size than B
- d) Ion formed by A: Anion
28) Draw a neat labelled diagram of Neuron.
Answer (what to draw & label):
Draw a neuron and label the following parts:
Dendrites
Cell body (Cyton)
Nucleus
Axon
Myelin sheath
Axon terminal (Synapse)
29) How does phototropism and geotropism occur in plants?
Answer:
Phototropism occurs due to unequal distribution of auxin hormone, causing plant parts (shoots) to bend towards light.
Geotropism occurs due to gravity; roots grow downward (positive geotropism) and shoots grow upward (negative geotropism).
30) What is pollination? Explain difference between self-pollination and cross-pollination.
Answer:
Pollination is the transfer of pollen grains from anther to stigma of a flower.
