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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2801. |
The molecular formula of green vitriol is MgSO_4.7H_2 O |
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| 2802. |
The molecular formula of an open chain organic compound is C_(3)H_(6). The class of the compound is……………. |
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Answer» alkane `C_(n)H_(2n)"n=2 "C_(2)H_(4)` `n=3 C_(3)H_(6)` `n=4 C_(4)H_(8)` |
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| 2803. |
The molecular formula of an alcohol is C_(4)H_(10)O. The locant number of its -OH group is 2. (i) Draw its structural formula. (ii) Give the IUPAC name. (iii) Is it saturated or unsaturated? |
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Answer» SOLUTION :(i) `CH_(3)-CH_(2)-UNDERSET(OH)underset(|)(CH)-CH_(3)[C_(4)H_(10)O]-OH` group is placed in the secondary CARBON atom. (ii) Butan-2-ol (iii) In butan-2-al all bonds are single bonds. So, this is a saturated COMPOUNDS. |
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| 2805. |
The molecular formula of 'A' is C_(10)H_(18) and B" is "C_(18)H_(36). Name the process by which they belong. |
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Answer» Solution :A. BELONGS to alkyne as general FORMULA of alkyne is `C_(N)H_(2n-n)` .B. belongs to alkene as general formula of alkene is `C_(n)H_(2n)`. |
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| 2806. |
The molecular formula of A is C_10H_18 and B is C_18H_36. Name the homologous series to which they belong . |
| Answer» Solution :`C_10 H_18`- alkyne and `C_(10)H_(36)` -ALKENE . | |
| 2807. |
The mole ratio hydrogen and oxygen gases liberated during electrolysis of water is |
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Answer» `1:1` |
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| 2808. |
The Molarity of a solution of sulphuric acid is 1.35 M. Calculate its molality. (The density of acid solution is 1.02 g cm^(–3)). |
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| 2809. |
The molarity of a solution obtained by mixing 750 mL of 0.5 M HCl with 250 mL of 2 M HCl will be |
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Answer» 0.975 M |
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| 2810. |
The molarity of 4 g of NaOH in 100 mL solution is |
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Answer» 1 M |
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| 2811. |
The molar volume of a gas at STP is …………. And the value of Avogadro Number is ……………….. |
| Answer» SOLUTION :22.4 LITRES, `6.-23xx10^(23)` | |
| 2812. |
The modern periodic table had been divided into ……………….blocks kno0wn as ………..blocks. |
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Answer» <P> SOLUTION : FOUR , s, p, d, F |
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| 2813. |
The mixing od aqueous solution od Na_(2)SO_(4) and BaC1_(2) results in the formation of |
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Answer» white PRECIPITATE of SODIUM chlride and is a combination reaction |
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| 2814. |
The minimum temperature required for a substance to burn is called the ignition temperature of the substance. |
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| 2815. |
The minimum energy that two molecules should possess so that their collisions result in a chemical reaction is called ____ energy. |
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| 2816. |
The minimum angular momentum ofan electron with the magnetic quantam nubers -1,0,+1 is "____________" |
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| 2817. |
The mineral form which a metal can be readily and economically exteracted on a large scale is said to be an ore . |
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| 2818. |
The mineral from which a metal can be radily and economically extracted on a large scale is said to bea/an ………………. . |
| Answer» ANSWER :A | |
| 2819. |
The mian objective of biosphere reserves is to |
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Answer» remove air POLLUTION |
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| 2820. |
The metals of group-2 from top tobottom are Be, Mg, Ca, Sr, Ba. Which of these metals will form ions mostreadily and why? |
| Answer» SOLUTION :BA, because its IONISATION ENERGY is LOW | |
| 2822. |
The metals at the bottom of activity series are the least reactive. |
| Answer» Solution :TRUE - HIGHER the position in the activity series, GREATER the activity. | |
| 2823. |
The metalloids include the elements |
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Answer» BORON, silicon |
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| 2827. |
The metal which can react both with acids and alkalis to produce hydrogen gas is |
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Answer» sodium |
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| 2828. |
The metal that liberate hydrogen gas when react with steam is ___________ |
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Answer» Magnesium |
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| 2831. |
The metal …………… plays a vital role in nulcear reactions releasing nuclear energy and used in nuclear weapons . |
| Answer» SOLUTION : URANIUM | |
| 2832. |
The metal extracted by the electrolysis method is : |
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Answer» Copper |
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| 2833. |
The metal extracted by the chemical reduction method is : |
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Answer» Sodium |
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| 2834. |
The metal deposited first at the cathode when a solution containing Fe^(+2), Cu^(+2) is electrolysed is _______ |
| Answer» Answer :B | |
| 2835. |
The metal can displace zinc from zinc sulphate solution : |
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Answer» Copper |
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| 2836. |
The melting point of ice under normal conditions is |
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Answer» `100^(@)` C |
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| 2839. |
The maxium value of l for n =4 is |
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Answer» 2 |
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| 2840. |
The maxium number of electron that electron that can be accomodated in p-subshell in 3rd orbital |
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Answer» 2 |
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| 2841. |
The maximum resistance which can be made using four resistors each of resistance (1)/(2)Omega is |
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Answer» `2Omega` |
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| 2842. |
The maximum number of electrons that can be accommodated in M Shell of an atom are |
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Answer» 8 |
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| 2843. |
The maximum ionisation enthalpy is shown by ___________. |
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| 2844. |
The maximum electronegativity is shown by ____________. |
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Answer» Li |
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| 2845. |
The mathematical representation of False Avogadro's law is V//n="constant"(or)Vprop(or) V="constant"xxn |
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| 2846. |
The massof themoleculeof anelement orcompound is measuredin hydrogenscale. |
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| 2847. |
The massof themoleculeof anelementorcompoundis measuredin ______ scale . |
| Answer» SOLUTION :`C^(-12)` | |
| 2848. |
The mass of proton or neutron is approximately ……………….. . |
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Answer» 1 amu |
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| 2849. |
The mass of sodium in 11.7 g of sodium chloride is |
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Answer» 2.3g 58.5 g sodium chloride contains 23 g sodium ` therefore ` 11.7 g sodium chloride contains `= (23)/(58.5) XX 11.7` = 4.6 g sodium |
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