Statement I : In the reaction between NH3 and BF3 to form adduct Lewis acid is BF3
Statement II : Electron deficient species are Lewis bases.
Statement II : Electron deficient species are Lewis bases.
Anonymous Quiz
32%
Both statement I and II are correct
29%
Statement I is incorrect and statement II is correct
14%
Both statements are false
25%
Statement I is correct and statement II is incorrect
💯2
Reductic acid contains 52.63% carbon, 5.30% hydrogen and 42.07% oxygen. Its empirical formula is the same as its molecular formula. What is the number of carbon atoms in a molecule of this acid?
Anonymous Quiz
23%
4
45%
5
24%
6
9%
8
👍2❤1
Statement I : Functional group in picric acid is -COOH group
Statement II: In phenol- OH group is a ortho, para directing group and ring activating group
Statement II: In phenol- OH group is a ortho, para directing group and ring activating group
Anonymous Quiz
30%
Statement I and II are correct
20%
Statement I and II are Incorrect
22%
Statement –I is true, statement-II is false
29%
Statement –I is false, statement-II is true
👍7
Number of Pi bonds in phenyl benzoate are ‘X’. Number of lone pairs in phenyl benzoate are ‘Y’ .Correct relation is
Anonymous Quiz
34%
X+Y=11
38%
2X+Y=11
21%
X+2Y=11
7%
X-Y=11
The base-emitter junctions of a transistor is
Anonymous Quiz
23%
a wide depletion layer
49%
Low resistance
21%
a reverse bias
7%
None
👍6
Which of the following combination is incorrectly matched for test, reagent and result? (Single Correct Answer)
Anonymous Quiz
15%
1. Dumas Method- CuO- Estimation of C,N,X- giving N2, CO2 and water
15%
2. Carius Method- HNO3+ AgNO3- Estimation of C,H and halogen- CO2, water and white ppt of AgX
14%
3. Kjeldahl's method - Conc. H2SO4 then treated with NaOH- Estimation Of N- give ammonia gas
10%
4. Carius Method- Conc HNO3 then treated with BaCl2- Estimation of S- Give BaSO4
13%
5. Carius Method- Conc HNO3 then add ammonia & ammonium molybdate or Magnesia - Estimation of P -yel
10%
6. Estimation of O- passing over red hot coke, then pass through warm I2O5- give CO2 & I2
7%
7. Estimation of C and H- Combustion in presence of O2- Give CO2 and water
17%
None of these
👍1
If the mass of an object is halved while its radius is doubled, what happens to its gravitational potential energy?
Anonymous Quiz
15%
It becomes half
47%
It becomes one-fourth
26%
It remains the same
12%
It becomes four times
👍4
What is the orbital velocity of a satellite in a circular orbit around Earth, given that the radius of the orbit is (7 \times 10^6 m)? (Use (G = 6.67 \times 10^{-11} Nm^2/kg^2))
Anonymous Quiz
31%
7 km/s
42%
10 km/s
20%
5 km/s
7%
15 km/s
👍7