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NEET Practice Questions (MCQs) with Answers & Solutions

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Which of the following metal is used in windows of X - ray tubes ?

A. Be B. Mg C. Ba D. Al

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Explanation

$ Gypsum = CaSO_4 . 2H_2O $ $ Plaster of paris = CaSO_4 . {1 \over 2 } H_2 O $ $ So, difference = 2 â€“ {1 \over 2 } = 1 {1 \over 2 } $

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Which of the following is not a Mg ore ?

A. Magnesite B. Gypsum C. Dolomite D. Carnalite

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The difference of water molecules in gypsum and plaster of paris is ...

A. $ {5 \over 2 } $ B. 2 C. $ {1 \over 2 } $ D. $ 1 { 1 \over 2 } $

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Which of the following exists in polymeric form ?

A. $ AlCl_3 $ B. SiC C. $ BeCl_2 $ D. $ B_2H_6 $

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The formula of carnalliteis ...

A. $ KCl ï§ MgCl_2 ï§ 2H_2O $ B. $ K_2O ï§ Al_2O_3 ï§ 6H_2O $ C. $ KCl g MgCl_2 g 6H_2O $ D. $ Na_2B_4O_7 ï§ 10H_2O $

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When NaOH is made, the gas released at the cathode is ...

A. $ Cl_2 $ B. $ H_2 $ C. $ O_2 $ D. $ H_2O $

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Choose proper option for matching column - I and column - II Column - I (A) NaOH (B) Na2CO3 (C) Liquid Na (D) Caesium Column - II (P) Photo electric cells (Q) Coolant in nuclear reactors (R) $ SO_2 $ absorber (S) Detergent

A. A-R, B-S, C-Q, D-P B. A-P, B-Q, C-R, D-S C. A-Q, B-P, C-R, D-S D. A-S, B-Q, C-P, D-R

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In the electrolytic separation of Li, KCl is added to LiCl

A. To increase the conductivity of LiCl B. To lower the fusion temperature of the mixure C. To decrease the conductivity of LiCl D. Both 1 & 2

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Molecular formula of Glauberâ€™s salt is ...

A. $ MgSO_4 â€¢ 7H_2O $ B. $ FeSO_4 â€¢ 7H_2O $ C. $ CuSO_4 â€¢ 5H_2O $ D. $ Na_2SO_4 â€¢ 10 H_2O $

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The name â€œBlue Johnâ€ is given to which of the following compounds.

A. $ CaH_2 $ B. $ CaF_2 $ C. $ Ca_3(PO_4)_2 $ D. CaO

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