Related InterviewSolutions

• Advantage of optical fibreA. high band width and EM interferenceB. low bnad width and EM interferenceC. high band width low transmission capacity and no EM interferenceD. high band width, high data transmission capacity and no. EM interference
• A solid reflects incident light and its electrical conductivity decreases with temperature. The binding in this solidsA. ionicB. covalentC. metallicD. molecular
• The equation `12x^(2)+7xy+ay^(2)+13x-y+3=0` represents a pair of perpendicular lines. Then, the value of a isA. `(7)/(2)`B. `-19`C. `-12`D. 12
• Which of the following is the weakest base ?A. Ethyl amineB. AmmoniaC. Dimethyl amineD. Methyl amine
• An isobar of `._(20)Ca^(40)` isA. `""_(18)Ar^(40)`B. `""_(20)Ca^(38)`C. `""_(20)Ca^(42)`D. `""_(18)Ar^(38)`
• Solubility of `Ca(OH)_(2)` is s mol `L^(-1).` The solubility product `(K_(sp))` under the same condition isA. `4s^(3)`B. `3s^(4)`C. `4s^(2)`D. `s^(3)`
• A radioactive isotope having `t_(1//2)` =3 days was read after 12 days . If 3 g of the isotope is now left in the container, the initial weight of isotope wasA. 12 gB. 24 gC. 36 gD. 48 g
• A transformer is used to light a `100 W` and `110 V` lamp from a `220V` mains. If the main current is `0.5 A`, the Efficiency of the transformer is approximately:A. `30%`B. `50%`C. `90%`D. `10%`
• The pH of a 0.1 M solution of `NH_(4)OH` (having `K_(b)=1.0xx10^(-5))` is equal toA. 10B. 6C. 11D. 12
• The purest zinc is made byA. electrolytic refiningB. zone refiningC. the van Arkel methodD. the Mond process