WBCS Preliminary 2023 General Science Question
The West Bengal Public Service Commission (WBPSC) held the 2023 West Bengal Civil Service (Exe.) Preliminary Examination on December 16, 2023. In this post we will know about the WBCS Preliminary 2023 General Science Question. Along with this WBCS Preliminary 2023 General Science Question we will highlight the answers of following questions.
WBCS Preliminary 2023 General Science Questions:
01. Identify the incorrect pair
(A) Kidney diseases - urologist ☑
(B) Blood-related diseases-haematologist
(C) Diseases of the stomach gastroenterologist
(D) Various types of cancer - oncologist
02. Which of the following diseases is autosomal?
(A) Haemophilia
(B) Thalassemia ☑
(C) Colour Blindness
(D) All of the above
03. For a floating body to be in stable equilibrium, where should its centre of buoyancy be located?
(A) At the centre of gravity
(B) Above the centre of gravity ☑
(C) Below the centre of gravity
(D) It may anywhere
04. Which hormone is responsible for breaking the dormancy of a seed?
(A) Auxin
(B) Dormin
(C) Cytokinin
(D) Gibberellin ☑
05. An iron ball is heated. The percentage increase will be largest in
(A) density
(B) surface area
(C) diameter
(D) volume ☑
06. Which is the reducing agent in the thermite reaction carried out for repairing of the railway track?
(A) Iron oxide
(B) Aluminium metal ☑
(C) Aluminium oxide
(D) Iron metal
07. The ion of an element has three positive change. Mass number of the atom is 27, and the number of neutrons is 14. What is the number of electrons in the ion?
(A) 13
(B) 10 ☑
(C) 14
(D) 16
08. Which of the following pairs comprises of the smallest and the largest endocrine glands of human respectively?
(A) Pituitary-thyroid
(B) Thyroid-pituitary
(C) Pineal body-ovary
(D) Pineal body-thyroid ☑
09. Two drops of liquid merge to form a single drop. In this process energy is
(A) absorbed.
(B) released ☑
(C) may be absorbed or released depending upon the specific heat of the liquid.
(D) neither absorbed nor released
10. If number of molecules present in 9g of water is n, then number of molecules present in 44 g of carbon-di-oxide is
(A) n
(B) 2n ☑
(C) n/2
(D) 3n
11. Identify the substance which can dissolve in water:
(A) Glucose
(B) Urea
(C) Acetone
(D) All of the above ☑
12. Which of the following reproductions is found in plants alone?
(A) Vegetative reproduction ☑
(B) Asexual reproduction
(C) Sexual reproduction
(D) Parthenogenesis
13. A drop of water is broken into two drops. The sum of which property of the two drops is equal to that of the single one?
(A) Radius
(B) Surface area
(C) Surface energy
(D) Volume ☑
14. A metallic ball has a spherical cavity at its centre. If the ball is heated what happens to the cavity?
(A) Its volume decreases.
(B) Its volume increases ☑
(C) Its volume remains unchanged.
(D) Its volume may increase or decrease depending upon the nature of the metal
15. Cause of myopia is
(A) contraction of eyeball
(B) expansion of eyeball ☑
(C) dryness of optic nerve
(D) All are true
16. Mg (s) + O2 (g) → MgO (s) + energy, this reaction may be classified as a/an
(A) Combination reaction
(B) Oxidation reaction
(C) Exothermic reaction
(D) All of the above ☑
17. One of the following terms includes rest of the lot. Identify that single term:
Glucocorticoids, Adrenaline, Mineralocorticoids, Suprarenal gland.
(A) Mineralocorticoids
(B) Adrenaline
(C) Suprarenal gland ☑
(D) Glucocorticoids
18. The main source of methane gas in India-
(A) Floriculture gardens
(B) Orchards
(C) Tea gardens
(D) Paddy fields ☑
19. Combine three resistors 5Ω, 4.5Ω and 3Ω in such a way that the total resistance of this combination is maximum with value
(A) 12.52 ☑
(Β) 13.5Ω
(C) 14.5Ω
(D) 16.5Ω
20. According to Newlands law of octaves, beryllium resembles which of the following elements?
(A) Sodium
(B) Magnesium ☑
(C) Calcium
(D) Aluminium
21. Baking soda is a mixture of
(A) sodium carbonate and acetic acid
(B) sodium carbonate and tartaric acid
(C) sodium hydrogen carbonate and tartaric acid ☑
(D) sodium hydrogen carbonate and acetic acid
22. The density of water at 20°C is 998 kg/m³ and that at 40°C is 992kg/m³ . The coefficient of the cubical expansion of water is
(A) \(2 \times 10^{-4} °C^{-1}\)
(B) \(6 \times 10^{-4} °C^{-1}\)
(C) \(3 \times 10^{-4} °C^{-1}\) ☑
(D) \(4 \times 10^{-4} °C^{-1}\)
23. The efficiency of a Carnot engine working between 227°C and 27°C is
(A) 100%
(B) 50%
(C) 40% ☑
(D) 20%
24. The word, 'Biodiversity' was coined by
(A) Ernst Mayr
(B) W.G. Rosen ☑
(C) Tansley
(D) Odum
25. What happens when the potassium iodide solution is added to a solution of lead nitrate?
(A) White precipitation of lead iodide is formed
(B) Yellow precipitation of lead iodide is formed ☑
(C) Red precipitation of lead iodide is formed
(D) Black precipitation of lead iodide is formed
26. In which substage of interphase is DNA doubled?
(A) G
(B) S ☑
(C) G2
(D) \(G_0\)
27. A bird is sitting in a wire cage hanging from the spring balance Let the reading of the spring . balance be \(W_1\) If the bird flies about inside the cage the reading of the spring balance becomes \(W_2\) . Which of the following is true ?
(A) \(W_1 \gt W_2\) ☑
(B) \(W_1 \lt W_2\)
(C) \(W_1 = W_2\)
(D) \(W_1 = \frac{1}{ W_2}\)
Conclusion:
These were WBCS Preliminary 2023 General Science Question along with answer ☑. If you want to take quiz please go to menu bar, where you will find quiz section. For audio visual class please scroll down and subscribe to our YouTube channel. If you have any doubt you can ask me on WhatsApp.