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Prelims

UPSC Prelims Questions

Practice UPSC Prelims MCQs by subject and year. Free questions with explanations for focused revision.

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Q.6967·Miscellaneous·2018·Easy

Which one of the following statements about temperature is correct?

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Q.6968·Miscellaneous·2018·Easy

Which one of the following is known as a zone of sharp salinity change in the vertical section of ocean?

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Q.6969·Miscellaneous·2018·Easy

Permanent hardness of water cannot be removed by which one of the following methods?

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Q.6970·Miscellaneous·2018·Easy

Which one of the following reactions will give NO (nitric oxide) gas as one of the products?

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Q.6971·Miscellaneous·2018·Easy

Which one of the following is a tribasic acid?

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Q.6972·Miscellaneous·2018·Easy

Which one of the following statements is not correct?

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Q.6973·Miscellaneous·2018·Easy

Which one of the following is called dry ice?

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Q.6974·Miscellaneous·2018·Easy

The acidic semidigested food coming out of the stomach is neutralized by

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Q.6975·Miscellaneous·2018·Easy

Which one of the following depicts the correct circuit of a reflex arc?

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Q.6976·Miscellaneous·2018·Easy

If one set of chromosomes for a given plant is represented as N; in case of double fertilization, the zygote and the endosperm nucleus of a diploid plant would have how many sets of chromosomes respectively?

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Q.6977·Miscellaneous·2018·Easy

Consider the following circuit : Which one of the following is the value of the resistance between points A and B in the circuit given above?

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Q.6978·Miscellaneous·2018·Easy

The absolute zero temperature is 0 Kelvin. In °C unit, which one of the following is the absolute zero temperature?

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Q.6979·Miscellaneous·2018·Easy

Consider the following statements about visible light, UV light and X-rays : 1. The wavelength of visible light is more than that of X-rays. 2. The energy of X-ray photons is higher than that of UV light photons. 3. The energy of UV light photons is less than that of visible light photons. Which of the statements given above is/are correct?

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Q.6980·Miscellaneous·2018·Easy

The time period of oscillation of a simple pendulum having length L and mass of the bob m is given as T. If the length of the pendulum is increased to 4L and the mass of the bob is increased to 2m, then which one of the following is the new time period of oscillation?

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Q.6981·Miscellaneous·2018·Easy

The connecting cable of electrical appliances like electric iron, water heater or room heater contains three insulated copper wires of three different colours—red, green and black. Which one of the following is the correct colour code?

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Q.6982·Miscellaneous·2018·Easy

The graphs between current (I) and voltage (V) for three linear resistors 1, 2 and 3 are given below : If R₁, R₂ and R₃ are the resistances of these resistors, then which one of the following is correct?

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Q.6983·Miscellaneous·2018·Easy

Consider the following statements about a microscope and a telescope : 1. Both the eyepiece and the objective of a microscope are convex lenses. 2. The focal length of the objective of a telescope is larger than the focal length of its eyepiece. 3. The magnification of a telescope increases with the increase in focal length of its objective. 4. The magnification of a microscope increases with the increase in focal length of its objective. Which of the statements given above are correct?

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Q.6984·Miscellaneous·2018·Easy

Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (River Basin) List-II (Town) A. Bhagirathi 1. Lansdowne B. Alaknanda 2. Narendra Nagar C. Nayar 3. Uttarkashi D. Ganga 4. Pauri Code :

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