Upsee

The velocity of a particle is zero at time t= 2 , then 

(A) acceleration must be zero at t= 2 

(B) displacement must be zero in the interval t = 0 to t = 2. 

(C) acceleration may be zero at t= 2 

(D) velocity must be zero for t> 2 

Which of these materials requires the least value of magnetic field strength to magnetize it? 

(A) Nickel 

(B) Silver 

(C) Tungsten 

(D) Sodium Chloride

Aldol condensation reaction is not given by 

(a) C₆H₅CH₂CHO 

(b) C₆H₅CHO 

(c) CH₃CHO 

(d) CH₃COCH₃ 

Total number of stereoisomers of the following compounds are respectively : 

(A) 4, 6 

(B) 8, 0 

(C) 6, 6 

(D) 8, 8

An example of a non-stoichiometric compound is 

(a) PbO 

(b) NiO₂. 

(c) Al₂O₃ 

(d) Fe₃O₄

The point on the line 4x + 3y = 5, which is equidistant from (1, 2) and (3, 4), is

(a) (7,-4) 

(b) (-10,15)

(c) (1/7, 8/7)

(d) (0, 5/4)

Which among the following compounds will have meso form? 

(A) CH₂OH – CHOH – CHOH – CHO

(B) CH₂OH – CHOH – CHOH – COOH 

(C) CH₂OH – (CHOH)₂ – CH₂OH 

(D) C₆H₃ – CHCl – CHOH – CH₃

Which reaction will not occur out of the following?

(A) Fe + H₂SO₄ → H₂ + FeSO₄ 

(B) Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag 

(C) 2KBr + I₂ → 2KI + Br₂ 

(D) CuO + H₂ → Cu + H₂O

The sides of a rectangle are 7.01m and 12m. Taking the significant figures into account , the area of the rectangle is :

(A) 84m² 

(B) 84.1m² 

(C) 84.00m² 

(D) 84.12m²

Permanent magnet has properties retentivity and coercivity respectively, 

(a) low-low 

(b) high-high 

(c) high-low 

(d) low-high