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1.

Assertion (A): Sodium hydrogen carbonate is used in baking cakes and pastries Reason (R): On heating sodium hydrogen carbonate, liberates bubbles of `CO_(2)` leaving holes in cakes and making them light and fluffy.A. both (A) and (R) are correct and (R) is the correct explanation of (A)B. both (A) and (R) are correct but (R) is not the correct explanation of (A)C. (A) is correct but (R) is wrongD. (A) is wrong but (R) is correct

Answer» Correct Answer - A
Discussion
2.

Choose the correct statementA. Rubidium is a radioactive element.B. Francium is highly radioactiveC. Alkali metals are less reactiveD. Alkali metals belong to 2s group

Answer» Correct Answer - B
Discussion
3.

Choose the correct statementA. Alkali metals act as good oxidising agent.B. Alkali metals act as good reducing agentC. Alkaline earth metals act as dehydrating agentsD. Alkaline earth metals act as decarboxylating agents

Answer» Correct Answer - B
Discussion
4.

Choose the correct statementA. Sodium carbonate `Na_(2) CO_(3).10H_(2)O` above 373K called soda ashB.  Sodium-calcium pump play an important role in transmitting nerve signals.C.  Radium is the most abundant alkaline earth metal.D. Common oxidation state of alkali metal is +2

Answer» Correct Answer - A
Discussion
5.

Which of the following salt is more soluble?A. `NaCIO_(4)`B. ` LiClO_(4)`C. `CsBr`D. KI

Answer» Correct Answer - B
Discussion
6.

Which of the following salt is more soluble?A. `NaClO_(4)`B. ` LiClO_(4)`C. `CsBr`D. KI

Answer» Correct Answer - B
Discussion
7.

Which of the following are stored under oil?A. Alkali metalsB. Coinage metalsC. Noble metalsD. Phosphorous

Answer» Correct Answer - A
Discussion
8.

Among the following pairs, which occurs in large amounts in sea water?A. Li, RbB. Cs, FrC. Na, KD. Be, He

Answer» Correct Answer - C
Discussion
9.

Which of the following is not a peroxide?A. `KO_(2)`B. `Cro_(5)`C. `Na_(2)O_(2)`D. `BaO_(20`

Answer» Correct Answer - A
Discussion
10.

Choose the correct pairA.  Lithium : LilacB. Potassium : Crimson redC. Caesium : BlueD. Rubidium : Yellow

Answer» Correct Answer - C
Discussion
11.

Choose the correct pairA. Sodium : SylviteB. Potassium : Rock saltC. Lithium : KaolineD. Sodium : Rock salt

Answer» Correct Answer - D
Discussion
12.

Choose the correct pairA. Liquid sodium metal : Coolant in fast nuclear reactorB. Caesium : fertilizerC. Potassium chloride : devising photo electric ccilsD. Lithium carbonate : electro chemical cells

Answer» Correct Answer - A
Discussion
13.

Choose the correct pairA. Sodium carbonate : `NaHCO_(3)`B. Sodium bicarbonate : `NaHCO_(3)`C. Cooking salt : NaClD.  Baking soda : `Na_(2) CO_(3)`

Answer» Correct Answer - B
Discussion
14.

Choose the correct pairA. Washing soda : NaClB. Baking soda:`Na_(2)CO_(3).10H_(2)O`C. Table salt:`NaHCO_(3)`D. Baking soda : `NaHCO_(3)`

Answer» Correct Answer - D
Discussion
15.

Choose the correct pairA. BerylliumB. Calcium: FluorapatiteC. Barium: BerylD. Strontium: Dolomite

Answer» Correct Answer - B
Discussion
16.

Which of the following fruits contain maximum of potassium?A. GrapesB. PotatoesC. BananasD.  Mangoes

Answer» Correct Answer - C
Discussion
17.

Which of the following ions are more responsible for transmission of nerve signal?A. `Li^(+)`B. `Rb^(+)`C. `Cs^(+)`D.  `K^(+)`

Answer» Correct Answer - A
Discussion
18.

Choose the correct pairA. Lime water: CaOB. Quick lime:`CaSO_(4)1//2H_(2)O`C. Gypsum: `Ca(OH)_(2)`D. Plaster of paris : `CaSO_(4).1//2 H_(2)O`

Answer» Correct Answer - D
Discussion
19.

Which is the function of sodium - potassium pump?A.  Maintenance of ion balanceB. Used in nerve impulse conductionC. Transmitting nerve signalsD.  Regulates the blood level

Answer» Correct Answer - C
Discussion
20.

Which of the following ions perform important biological functions in maintenance of the ion balance and nerve impulse conduction?A. `Li^(+) Rb^(+)`B. `Na^(+) K^(+)`C. `Cs^(+) Fr^(+)`D. `Rb^(+) Cs^(+)`

Answer» Correct Answer - B
Discussion
21.

Which of the following is insoluble in water?A. LiFB. NaClC. KBD. NaBr

Answer» Correct Answer - A
Discussion
22.

Choose the incorrect pairA. Lithium: Crimson redB. Sodium : YellowC. Potassium : BlueD. Rubidium : Reddish violet

Answer» Correct Answer - C
Discussion
23.

Choose the incorrect pairA. LithiumB. Lithium carbonate : MedicinesC. Liquid sodium : FertilizersD. Caesium:Photo electric cells

Answer» Correct Answer - C
Discussion
24.

Choose the incorrect pairA. `Na_(2) CO_(3).10 H_(2)O`:Washing sodaB. `NaHCO_(3)`:Baking sodaC. NaCl:Cooking saltD. NaOH :Soda lime

Answer» Correct Answer - D
Discussion
25.

Choose the incorrect pairA. Calcium: Brick redB. Strontium: CrimsonC. Sodium: BlueD. Barium: Apple green

Answer» Correct Answer - C
Discussion
26.

Which one of the following is covalent in character?A. `BeCl_(2)`B. `MgCl_(2)`C. `CaCl_(2)`D. `BaCl_(2)`

Answer» Correct Answer - A
Discussion
27.

Choose the incorrect pairA. Calcium: DeoxidiserB. Strontium: Cancer therapyC. Radium: Aircraft switchesD. Beryllium:desiccant

Answer» Correct Answer - D
Discussion
28.

Among the following, which is the fifth most abundant element?A. BerylliumB. BariumC. RadiumD. Calcium

Answer» Correct Answer - D
Discussion
29.

Which one of the following gives red colour in flame test?A. LithiumB. SodiumC. PotassiumD. Francium

Answer» Correct Answer - A
Discussion
30.

Assertion (A): Lithium salt are more soluble than salts of other metals of group-I Reason (R): The high solubility of Li salts is due to strong solvation of small size of Li ion.A. Both (A) and (R) are correct and (R) is the correct explanation of (A).B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)C. (A) is correct but (R) is wrongD. (A) is wrong but (R) is correct

Answer» Correct Answer - D
Discussion
31.

Assertion (A): LiF is less soluble in water. Reason (R): LiF has high lattice enthalpy and small size of `Li^(+)` and F^(-)`A. Both (A) and (R) are correct and (R) is the correct explanation of (A)B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)C. (A) is correct but (R) is wrongD. (A) is wrong but (R) is correct

Answer» Correct Answer - A
Discussion
32.

Which one of the following is true?A. `Ca(OH)_(2)`B. `Mg(OH)_(2)`C. `NaOH`D. `Al(OH)_(3)`

Answer» Correct Answer - C
Discussion
33.

Which one of the following is more basic?A. `Ca(OH)_(2)`B. `Mg(OH)_(2)`C. `NaOH`D. `Al(OH)_(3)`

Answer» Correct Answer - C
Discussion
34.

Assertion (A): Alkali metal salts with conc.HCl on heating gives characteristic coloured flame. Reason (R): The heat in the flame excited the valence electron to higher energy level and when it drops back, the excess energy emitted as light in the visible region gives colourA. Both (A) and (R) are correct but (R) is not the correct explanation of (A)B. Both (A) and (R) are correct and (R) is the correct explanation of (A)C. (A) is correct but (R) is wrong.D. (A) is wrong but (R) is correct

Answer» Correct Answer - B
Discussion
35.

Which one of the following is less soluble in water?A. LiCIB. NaClC. KCID. CsI

Answer» Correct Answer - A
Discussion
36.

Which one of the following is the smallest atom?A.  FranciumB. RubidiumC. LithiumD. Sodium

Answer» Correct Answer - C
Discussion
37.

Which of the following is the least thermally stable?A. `MgCO_(3)`B. `CaCO_(3)`C.  `SrCO_(3)`D. `BeCO_(3)`

Answer» Correct Answer - D
Discussion
38.

Statement-I: `BeCl_(2)` is soluble in organic solvent. Statement-II: Since `BeCl_(2)` is a covalent compound, it is soluble in organic solvent.A. Statements-I and II are correct and statement-II is the correct explanation of statement-I.B. Statements-I and II are correct but statement-II is not the correct explanation of statement-l.C. Statement-I is wrong but statement-II is correctD. Statement-I is correct but statement-II is wrong

Answer» Correct Answer - A
Discussion
39.

Which colour is produced when alkali metals dissolved in liquid ammonia?A. RedB. GreenC. BlueD. Violet

Answer» Correct Answer - C
Discussion
40.

Statement-I: Alkali metals are very soft metals Statement-II: Since the atoms of alkali metals have bigger kernels and smaller number of valence electrons, the metallic bonds in them are very weak and hence they are softA. Statements-I and II are correct but statement-II is not the correct explanation of statement-IB. Statements-I and II are correct and statement-II is the correct explanation of statement-IC. Statement-I is correct but statement-II is wrongD. Statement-I is wrong but statement-II is correct.

Answer» Correct Answer - B
Discussion
41.

Which one of the following alkali metals is highly reactive with water?A. LiB. CsC. RbD. K

Answer» Correct Answer - D
Discussion
42.

Among the alkaline earth metals, which is radioactive in nature?A. BerylliumB. CalciumC. RadiumD. Barium

Answer» Correct Answer - C
Discussion