s-Block Elements PYQs Set 19 (PDF)

Set 19 of 20 · Questions 541-570 of 584

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JEE Main Chemistry · s-Block Elements · Set 19 (Q541-570)

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541.
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) $HOCl and H O C l_{2}$
542.
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) $A, B & D only$
543.
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) $X e O_{4}$
544.
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) $Four$
545.
$Match List I with List II$
$List-I$ $List-II$
$(A) Slaked lime$ $(I) NaOH$
$(B) Dead burnt plaster$ $(II) Ca (O H)_{2}$
$(C) Caustic soda$ $(III) N a_{2} C O_{3} . 1 O H_{2} O$
$(D) Washing soda$ $(IV) C a S O_{4}$
$Choose the correct answer form the options given below:$
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) $(A) - III, (B) - II, (C) - IV, (D) - I$
546.
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) $H_{4} P_{2} O_{6}$
547.
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) $It is the super oxide of sodium.$
548.
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) $K$
549.
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) $Linear, Square planar, Pyramidal$
550.
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) $HPO_{3}, NO$
551.
A metal (A) on heating in nitrogen gas gives compound B. B on treatment with $H_{2}$ O gives a colorless gas which when passed through $C u S O_{4}$ solution gives a dark blue-violet coloured solution. A and B respectively, are :
1. (1) $Mg and M g_{3} N_{2}$
2. (2) $Na and N a N O_{3}$
3. (3) $Mg and Mg (N O_{3})_{2}$
4. (4) $Na and N a_{3} N$
552.
Match the following
$List-I (molecule/ion) (A) XeF_{2} (B) XeO_{3} (C) XeF_{4} (D) PF_{6}^{-} List-II (Number of lone pairs of electrons on the central atom (I) 2 (II) 0 (III) 3 (IV) 1$
The correct answer is
1. (1) $A-III, B-IV, C-I, D-II$
2. (2) $A-I, B-II, C-IV, D-III$
3. (3) $A-II, B-I, C-III, D-IV$
4. (4) $A-III, B-IV, C-II, D-I$
553.
Compound A reacts with $N H_{4}$ C1 and forms a compound B. Compound B reacts with $H_{2}$ O and excess of $C O_{2}$ to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound A. B and C, are respectively.
1. (1) $C a C l_{2}, N H_{3}, N H_{4} H C O_{3}$
2. (2) $C a C l_{2}, NHT, (N H_{4})_{2} C O_{3}$
3. (3) $Ca (O H)_{2}, N H_{3}, N H_{4} H C O_{3}$
4. (4) $Ca (O H)_{2}, NH_{4}^{+}, (N H_{4})_{2} C O_{3}$
554.
Which of the following compounds of xenon has pyramidal geometry?
1. (1) $XeF_{2}$
2. (2) $XeF_{4}$
3. (3) $XeOF_{4}$
4. (4) $XeO_{3}$
555.
Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is :
1. (1) $0$
2. (2) $1$
3. (3) $2$
4. (4) $3$
556.
In the following, the oxoacid with a peroxy bond is
1. (1) $H_{2} S_{2} O_{5}$
2. (2) $H_{2} S_{2} O_{6}$
3. (3) $H_{2} S_{2} O_{7}$
4. (4) $H_{2} S_{2} O_{8}$
557.
The gas produced by the passage of air over hot coke is
1. (1) $carbon monoxide$
2. (2) $carbon dioxide$
3. (3) $produced gas$
4. (4) $water gas$
558.
What is the geometry of molecule of bromine pentafluoride?
1. (1) $Square planar$
2. (2) $Trigonal bipyramidal$
3. (3) $Square pyramidal$
4. (4) $Octahedral$
559.
The $P - P - P$ bond angle in $P_{4}$ and $S - S - S$ bond angle in cyclo $S_{8}$ molecule are respectively
1. (1) $107^{\circ}, 60^{\circ}$
2. (2) $60^{\circ}, 40^{\circ}$
3. (3) $60^{\circ}, 107^{\circ}$
4. (4) $40^{\circ}, 60^{\circ}$
560.
On treating $SO_{2}$ with aqueous solution of $KMnO_{4}$ , the manganese ion reduces to
1. (1) $Mn^{2 +} only$
2. (2) $Mn^{4 +} only$
3. (3) $Mn^{6 +} only$
4. (4) $Mn^{4 +} and Mn^{6 +}$
561.
A few grams of sodium carbonate is added to $1 L$ of water. What is the $pH$ or $pH$ range of resultant solution?
1. (1) $7 - 14$
2. (2) $7.0$
3. (3) $1.0$
4. (4) $1 - 4$
562.
$CaCO_{3}$ was reacted with dil $HCl$ to form three products. One of the products formed, when passed into slaked lime gave $X$ . What is $X$ ?
1. (1) $CaCl_{2}$
2. (2) $CaCO_{3}$
3. (3) $Ca (OH)_{2}$
4. (4) $Ca (HCO_{3})_{2}$
563.
Which of the following is known as silicone?
1. (1)
2. (2)
3. (3) $Polymer of SiO_{2}$
4. (4) $Polymer of (SiO_{4})^{4 -}$
564.
The number of bonds between sulphur and oxygen atoms in $S_{2}$ O $_{8}^{2-}$ and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively, are :
1. (1) $8 and 8$
2. (2) $8 and 6$
3. (3) $4 and 6$
4. (4) $4 and 8$
565.
Electronic configuration of calcium atom may be written as
1. (1) $[Ne] 4 p^{2}$
2. (2) $[Ar] 4 s^{2}$
3. (3) $[Ne] 4 s^{2}$
4. (4) $[Ar] 4 p^{2}$
566.
When $PbO_{2}$ reacts with concentrated $HNO_{3}$ , the gas evolved is
1. (1) $NO_{2}$
2. (2) $O_{2}$
3. (3) $N_{2}$
4. (4) $N_{2} O$
567.
Identify the correct statement(s) from the following:
I. The catenation property of group 14 elements decreases from carbon to tin.
II. Fullerene $(C_{60})$ has 20 five-membered carbon rings and 12 six-membered carbon rings.
III. $SiO_{2}$ is soluble in conc. $NaOH$ .
1. (1) $Only II$
2. (2) $I, III$
3. (3) $I, II$
4. (4) $II, III$
568.
Gas ' $X$ ' is obtained on heating $KClO_{3}$ with catalyst $MnO_{2}$ . This gas (in excess) on reaction with white phosphorus forms an acidic oxide ' $Y$ '. ' $Y$ ' on dissolving in water forms a compound ' $Z$ '. Identify $X, Y$ and $Z$ .
1. (1) $O_{2}, P_{2} O_{5}, H_{3} PO_{4}$
2. (2) $O_{3}, P_{2} O_{5}, H_{3} PO_{4}$
3. (3) $O_{2}, P_{2} O_{3}, H_{3} PO_{3}$
4. (4) $O_{2}, P_{2} O_{5}, H_{3} PO_{3}$
569.
Which of the following compounds are formed, when boron trichloride is treated with water?
1. (1) $H_{3} BO_{3} + HCl$
2. (2) $B_{2} H_{6} + HCl$
3. (3) $B_{2} O_{3} + HCl$
4. (4) $HBO_{3} + HCl$
570.
$BeO reacts with HF in presence of ammonia to give [A] which on thermal decomposition produces [B] and ammonium fluoride. Oxidation state of Be in [A] is_______$