5. Assertion : The presence of a large number of Schottky defects in NaCl lowers its density. Reason : In NaCl there are approximately
106 Schottky pairs per cm3 at room temperature.
a. If both assertion and reason are true and the reason is the correct explanation of the assertion
b. If both assertion and reason are true but reason is not the correct explanation of the assertion
c. If assertion is true but reason is false
d. If the assertion and reason both are false
e. if assertion is false but reason is true.
Ans. b
Explanation : When an atom or an ion is missing from its normal lattice site a lattice vacancy or defect is created which is called schottky defect. Due to missing density of crystal will be lowered.
Best Chemistry Teacher in Chandigarh and mohali Flame Institute provides top-notch chemistry coaching with expert faculty, offering comprehensive guidance for IIT-JEE chemistry, NEET chemistry, and CBSE chemistry exams. Our students benefit from detailed explanations of organic chemistry, inorganic chemistry, and …
dm-3 sucrose solution at 20 ° C (molar gas constant, R = 8.314 JK -1 mol -1 ; 1 dm-3 = 0.001 m3 ) a. 4870 Pa b. 4.87 Pa c. 0.00487 Pa d. 0.33 Pa Ans. a (17)
