s-Block Elements PYQs Set 18 (PDF)

Set 18 of 20 · Questions 511-540 of 573

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NEET Chemistry · s-Block Elements · Set 18 (Q511-540)

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511.
Among the statements (a)–(d), the correct ones are :
(A) Lithium has the highest hydration enthalpy among the alkali metals.
(B) Lithium chloride is insoluble in pyridine.
(C) Lithium cannot form ethynide upon its reaction with ethyne.
(D) Both lithium and magnesium react slowly with $H_{2}$ O.
1. (1) $(A), (B) and (D) only$
2. (2) $(B) and (C) only$
3. (3) $(A) and (D) only$
4. (4) $(A), (C) and (D) only$
512.
Match the following compounds with their corresponding physical properties.
$Column I A. IBr B. ClF_{3} C. BrF_{3} D. ICl_{3} Column II 1. Orange solid 2. Yellow-green liquid 3. Black solid 4. Colourless gas$
A B C D
1. (1) $2 1 4 3$
2. (2) $1 3 2 4$
3. (3) $3 4 2 1$
4. (4) $4 2 1 3$
513.
The commercial name for calcium oxide is :
1. (1) $Quick lime$
2. (2) $Milk of lime$
3. (3) $Slaked lime$
4. (4) $Limestone$
514.
The correct statement(s) among, I to III with respect to potassium ions that are abundant within the cell fluids is/are:
I. They activate many enzymes.
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions, they are responsible for the transmission of nerve signals
1. (1) $I and III only$
2. (2) $III only$
3. (3) $I and II only$
4. (4) $I, II and III$
515.
Which of the following is not formed when $H_{2}$ S reacts with acidic $K_{2} C r_{2} O_{7}$ solution ?
1. (1) $C r S O_{4}$
2. (2) $C r_{2} (S O_{4})_{3}$
3. (3) $K_{2} S O_{4}$
4. (4) $S$
516.
The reaction between sodium and water can be made less vigorous by
1. (1) $lowering the temperature$
2. (2) $adding a little alcohol$
3. (3) $amalgamating sodium$
4. (4) $adding a little acetic acid.$
517.
Which one of the following compounds is a peroxide?
1. (1) $K O_{2}$
2. (2) $B a O_{2}$
3. (3) $M n O_{2}$
4. (4) $N O_{2}$
518.
The function of Sodium pump” is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?
1. (1) $K^{+}$
2. (2) $F e^{2 +}$
3. (3) $C a^{2 +}$
4. (4) $M g^{2 +}$
519.
Which electrolyte is used in Dennis method for the preparation of fluorine ?
1. (1) $K H F_{2} solution in anhydrous HF$
2. (2) $molten cryolite$
3. (3) $pure dry molten K H F_{2}$
4. (4) $none of these$
520.
The following statements concern elements in the periodic table. Which of the following is true?
1. (1) $The Group 13 elements are all metals.$
2. (2) $All the elements in Group 17 are gases.$
3. (3) $Elements of Group 16 have lower ionization enthalpy values compared to those of Group 15 in the corresponding periods.$
4. (4) $For Group 15 elements, the stability of +5 oxidation state increases down the group.$
521.
Which of the given statements are correct, when carboxyheamoglobin reaches to $3 - 4 %$ in blood?
I. Leads to headache.
II. Results in cardiovascular problem.
III. Increases the body temperature.
IV. Leads to diarrhoea.
1. (1) $I and II$
2. (2) $I and III$
3. (3) $III and IV$
4. (4) $II and III$
522.
Identify a metalloid from the following list of elements.
1. (1) $Carbon$
2. (2) $Neon$
3. (3) $Sodium$
4. (4) $Tellurium$
523.
S-block element which cannot be qualitatively confirmed by the flame test is
1. (1) $Li$
2. (2) $Na$
3. (3) $Rb$
4. (4) $Be$
524.
Oxidation number of potassium in $K_{2}$ O, $K_{2} O_{2}$ and $K O_{2}$ , respectively, is:
1. (1) $+1, +2 and +4$
2. (2) $+1, +4 and +2$
3. (3) $+1, +1 and +1$
4. (4) $+2, +1 and + \frac{1}{2}$
525.
A crystalline solid $X$ reacts with dil. $HCl$ to liberate a gas $Y$ . Y decolourises acidified $KMnO_{4}$ . When a gas $Z$ is slowly passed into an aqueous solution of $Y$ , colloidal sulphur is obtained. $X$ and $Z$ could be, respectively
1. (1) $Na_{2} S, SO_{3}$
2. (2) $Na_{2} SO_{4}, H_{2} S$
3. (3) $Na_{2} SO_{3}, H_{2} S$
4. (4) $Na_{2} SO_{4}, SO_{2}$
526.
One of the by-products formed during the recovery of $NH_{3}$ from Solvay process is :
1. (1) $Ca (OH)_{2}$
2. (2) $NaHCO_{3}$
3. (3) $CaCl_{2}$
4. (4) $NH_{4} Cl 0$
527.
The salt which responds to dilute and concentrated $H_{2} SO_{4}$ is
1. (1) $Ba (NO_{3})_{2}$
2. (2) $Na_{3} PO_{4}$
3. (3) $CaF_{2}$
4. (4) $Na_{2} SO_{4}$
528.
Hydrogen peroxide acts both as an oxidizing and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $H_{2} O_{2}$ acts as a reducing agent in acid medium ?
1. (1) $MnO_{4}^{-}$
2. (2) $C r_{2} O_{7}^{2-}$
3. (3) $SO_{3}^{2-}$
4. (4) $KI$
529.
Identify the pollutant gases largely responsible for the discoloured and Iustreless nature of marble of the Taj Mahal.
1. (1) $S O_{2} and N O_{2}$
2. (2) $S O_{2} and O_{3}$
3. (3) $O_{3} and C O_{2}$
4. (4) $C O_{2} and N O_{2}$
530.
Brown ring test is used for detection of which radical?
1. (1) $Ferrous$
2. (2) $Nitrite$
3. (3) $Nitrate$
4. (4) $Ferric$
531.
Chlorine water on standing loses its colour and forms:
1. (1) $HCl only$
2. (2) $HCl and H C l O_{2}$
3. (3) $HCl and HOCl$
4. (4) $HOCl and H O C l_{2}$
532.
Identify the correct orders from the following with respect to the property associated with
A. $NH_{3} > PH_{3} > AsH_{3} > SbH_{3}$ - Bond Angle
B. $NH_{3} > PH_{3} > AsH_{3} > SbH_{3}$ - Basic Character
C. $PH_{3} > AsH_{3} > SbH_{3} > NH_{3}$ - Thermal stability
D. $SbH_{3} > NH_{3} > AsH_{3} > PH_{3}$ - Boiling point
1. (1) $A, B & C only$
2. (2) $A, C & D only$
3. (3) $B, C & D only$
4. (4) $A, B & D only$
533.
Which of the following xenon-OXO compounds may not be obtained by hydrolysis of xenon fluorides ?
1. (1) $X e O_{2} F_{2}$
2. (2) $X e O F_{4}$
3. (3) $X e O_{3}$
4. (4) $X e O_{4}$
534.
Electronic configuration of only one $p$ -block element is exceptional. One molecule of that element consists of how many atoms of it?
1. (1) $One$
2. (2) $Two$
3. (3) $Three$
4. (4) $Four$
535.
$Match List I with List II$
$List-I$ $List-II$
$(A) Slaked lime$ $(I) NaOH$
$(B) Dead burnt plaster$ $(II) Ca (O H)_{2}$
$(C) Caustic soda$ $(III) N a_{2} C O_{3} . 1 O H_{2} O$
$(D) Washing soda$ $(IV) C a S O_{4}$
$Choose the correct answer form the options given below:$
1. (1) $(A)-I,(B)-IV,(C)-II,(D)-III$
2. (2) $(A) - III, (B) - IV, (C) -II, (D) - I$
3. (3) $(A) - II, (B) - IV, (C) -1, (D) - III$
4. (4) $(A) - III, (B) - II, (C) - IV, (D) - I$
536.
What is the chemical formula of hypophosphorus acid?
1. (1) $H_{3} PO_{3}$
2. (2) $H_{3} PO_{2}$
3. (3) $H_{3} PO_{4}$
4. (4) $H_{4} P_{2} O_{6}$
537.
Which of the following statements about $N a_{2} O_{2}$ is not correct ?
1. (1) $It is diamagnetic in nature.$
2. (2) $It is a derivative of H_{2} O_{2}$
3. (3) $N a_{2} O_{2} oxidises C r^{3 +} to CrO_{4}^{2-} in acid medium.$
4. (4) $It is the super oxide of sodium.$
538.
The nitrate of which of the following metals does not liberate $NO_{2}$ gas on heating?
1. (1) $Pb$
2. (2) $Ba$
3. (3) $Li$
4. (4) $K$
539.
The shapes of $XeF_{2}, XeF_{4}$ , and $XeO_{3}$ respectively are
1. (1) $Linear, Tetrahedral, Pyramidal$
2. (2) $Angular, Square Planar, Pyramidal$
3. (3) $Linear, Tetrahedral, Planar$
4. (4) $Linear, Square planar, Pyramidal$
540.
In the reaction of phosphorous with conc. $HNO_{3}$ , the oxidized and reduced products respectively are
1. (1) $H_{3} PO_{4}, NO_{2}$
2. (2) $H_{3} PO_{2}, NO$
3. (3) $H_{3} PO_{3}, N_{2} O$
4. (4) $HPO_{3}, NO$