The Boolean expression of an OR gate is ______...? Mcqs

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The Boolean expression of an OR gate is ______...?

(A) A . B
(B) A + B

(C) A x B
(D) None of these

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The electromagnetic rays used in radiotherapy to destroy cancer cells are ______...?

(A) Infrared rays
(B) X-rays

(C) Visible rays
(D) Ultraviolet rays

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The elements in ecosystem recycle through organisms with environment is called ____...?

(A) Food chain
(B) Food web

(C) Chemical cycle
(D) Biogeochemical

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Stars are huge balls of gas mainly consist of _______ and ________...?

(A) Oxygen, Nitrogen
(B) Helium, Oxygen

(C) Hydrogen, Helium
(D) Nitrogen, Carbon

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If an element B has five protons and six neutrons what will be the symbol of element B _____...?

(A) 115B
(B) 11B

(C) 115B
(D) None

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The planets visible to us without using a telescope are __________...?

(A) 3
(B) 4

(C) 5
(D) 6

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If nucleon number of potassium is 39, number of neutrons will be _______...?

(A) 39
(B) 19

(C) 20
(D) 29

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A crescograph is a device for measuring the growth in __________...?

(A) Micro Organism
(B) Plants

(C) Human
(D) Pollution

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Which of the following is not a characteristic of a Monocot Plants...?

(A) Its leaves have parallel venation
(B) Its seed consist of one cotyledon

(C) Its flowers have three or multiple of three floral leaves
(D) Its flowers have four or multiple of four floral leaves

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Which one of the following is also called Stranger Gas...?

(A) Neon
(B) Argon

(C) Xenon
(D) Nitrous oxide

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