`(6)^4-:(36)^3xx216=6^((?-5))` `1` b. `4` c. `6` d. `7`

(216)^(4)div(36)^(4)xx(6)^(5)=(6)^(?)

(18)^(3.5)-:(27)^(3.5)xx6^(3.5)=2^(7)3.5b.4.5c.6d.7e. none of these

What should come in place of the question mark(?) inthe following questions? (6)^(4)-:(36)^3 xx 216 = 6 ^(" ?-8")

(5.4-:3xx16-:2)/(18-:5xx6-:3) a.2 b.4 c.6 d.8

6^(1.2)xx36^(?)xx30^(2.4)xx25^(1.3)=30^(5) a.0.1b.0.7 C.1.4d.2.6e. None of these

8^(7)xx2^(6)-:8^(2.4)=8^(?) a.6.6b.8.6c.9.6d.10.6

Calculate the following a. (6.7 xx 10^(5)) xx (4.6 xx 10^(4)) b. (7.6 xx 10^(7)) xx (3.8 xx 10^(-4)) c. (6.8 xx 10^(-3)) xx (5.2 xx 10^(-4)) d. (6.7 xx 10^(5)) / (4.6 xx 10^(4)) e. (7.6 xx 10^(7)) / (3.8 xx 10^(-4)) f. (6.8 xx 10^(-3)) / (3.8 xx 10^(-4)) g. 7.65 xx 10^(2) + 2.72 xx 10^(3) h. 7.87 xx 10^(-4) - 2.61 xx 10^(-5)

(4+4×18−6−8)/(123×6−146×5)=? (a) 1 (b) 2 (c) 6.65 (d) 7.75

(6xx6xx6xx6xx6xx6)^(4)xx(6xx6xx6xx6)^(5) div (6xx6)^(7)=(36)^(?)

The dissociation constant of monobasic acids A, B,C and D are 6 xx 10^(-4),5xx10^(-5), 3.6 xx 10^(-6) , and 7 xx 10^(-10) , respectively. The pH values of their 0.1M aqueous solutions are in the order.