# Exam will start from August 17, before that you must study these main questions of general science

RRB Group D General Science (GS) Practice Set 05 : Indian Railway Recruitment Board (RRB) has started the recruitment process for Group D posts, this exam will be conducted from August 17, 2022 and there is a provision to complete this exam in several phases, it is worth mentioning that now the candidate will have to give only one exam and On the basis of that candidates will be selected and the vacant posts will be filled.

In such a situation, 25 important questions and answers of General Science related to Group D exam have been included in front of you through this article. Practice these questions before going to the exam and strengthen your preparation.

## RRB Group D General Science (GS) Practice Set 05

Question. After 560 days the radioactive substance is reduced to 1/6 g. The half-life of a radioactive material is-

• 140 days
• 280 days
• 70 days
• 216 days

Question. Nitrogen fixation bacterium is-

• rhizobium
• Azatobacter
• Chlorobium
• all of the above

Question. Which color of light has a wavelength of 5450Å?

• red
• Blue
• green
• purple

Question. A bullet of mass 50 gm is fired from a rifle of mass 4kg with a velocity of 35 m/sec. The initial recoil velocity of the rifle is

• -0.66 m/s
• -0.88 m/s
• -0.44 ms
• none of these

Question. If the critical angle of glass-air is , then the refractive index of glass with respect to air will be-

• sineθ
• cosecθ
• sin
• 1/sin²θ

Question. The focal length of a lens is 20 cm, then its power will be

• 20 diopters
• 0.5 diopters
• 0.05 diopters
• 5 diopters

Question. The pH value of HCI solution is 4. The molarity of this solution is

Question. The unit of resistance is-

• weber
• ampere
• Om
• henry

Question. Approximately how many calories of heat will be produced in a 210 watt electric bulb in 5 minutes?

Question. interference may occur

• in all waves
• only in transverse waves
• only in longitudinal waves
• only in standing waves

Question. If the current in an electrical resistance is increased by 3%, its power will increase

Question. What is the memory buffer used to adjust the speed difference called?

• catch
• steak pointer
• accumulator
• Disc

Question. The chemical equivalent is equal to-

• Valency / Atomic Weight
• atomic mass/valency
• atomic mass x valency
• atomic weight only

Question. A cricketer catches a ball of 200 gm coming towards him with a velocity of 20 m/s. What is the impulse of the force by his hand?

• 4kgm/s
• 8kgm/s
• 12kgm/s
• 32kgm/s

Question. The exponent of the particle theory of light is

• frelan
• huygens
• newton
• maxwell

Question. Hydrolysis of lactose is obtained by—

• glucose + galactose
• fructose + galactose
• Glucose + Fructose
• glucose + mannose

Question. The Boolean expression of ‘OR’ gate is-

Question. The common name for “Pond’s silk” is

• vochoria
• of volvox
• of spirogyra
• of eulothrix

• prom
• catch memory
• eeprom
• RAM

Question. Eka – Aluminum was named as a …… metal in the modern periodic table.

• scandium
• gallium
• aluminum
• germanium

Question. Binary number 111 represents—

• three
• Seven
• one hundred and eleven
• One

Question. A major polymer of bacterial cell wall is

• peptidoglycan
• cellulose
• chitin
• xylan

Question. Chromium oxide in paints makes up what color of paint?

• white
• green
• red
• Blue

Question. DNA is different from RNA

• only in the form of pyrimidines
• in the form of sugars and pyrimidines
• only in the form of purino
• in the form of sugar only

Question. An image of an object is formed on the retina of the human eye.

• imaginary, straight
• imaginary, inverted
• real, straight
• real, reverse

What would be the correct answer to this question? Do give us your answer in the comment section.

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