h is factor of `2pi (h +r).` True or false.

HCF of two numbers is always a factor of their LCM (True/false).

The factors of a ^(2) - 2 ab + b ^(2) are (a+b) and (a +b). True or false.

Some of the factors of (n ^(2))/(2) + (n)/(2) are (1)/(2) ,n and (n+1). True or false.

If (-pi)/(2) le x le (3pi)/(2) then tanx is an increasing function. Check whether True or False.

The reaction : Cr_2O_7^(2-) +H_2OhArr 2CrO_4^(2-) +2H^(+) cannot be regarded as a redox reaction . True or False

Directions for questions : State whether the following statements are true or false. Auxiliary formula of A = pi r^(2) is r = (A)/( pi) .

Assertion: x-a,y-a,z-a are in G.P., Reason: If a,b,c are in H.P. then a- b/2, b- b/2, c- b/2 are in G.P. (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true R is not te correct explanation of A (C) A is true but R is false. (D) A is false but R is true.

Zinc sulphate solution on passage of H_2S gives flesh coloured precipitate. True or False?