Title Significant figures, Units for Measurement.pdf ✅

(1.) Using the rules for significant figures, the correct answer for the expression 0.02858 0.112 0.5702  will be (a.) 0.005613 (b.) 0.00561 (c.) 0.0056 (d.) 0.006 JEE Main-29.06.2022, Shift-II (2.) The units of surface tension and viscosity of a liquid respectively are (a.) 1 1 1 kgm s , N m − − − (b.) 1 1 1 Nm , kg m s − − − (c.) 2 1 2 kgm s , N m − − (d.) 1 2 1 Nm , kg m s − − #TS-EAMCET 09.08.2021, Shift-I, WB-JEE-2015# (3.) Given the numbers : 161 cm,0.161 cm,0.0161 cm. The number of significant figures for the three numbers are (a.) 3,4 and 5 respectively (b.) 3,3 and 4 respectively (c.) 3,3 and 3 respectively (d.) 3,4 and 4 respectively BITSAT 200 NEET 199: (4.) The prefix 18 10 is (a.) giga (b.) kilo (c.) Exa (d.) nano BITSAT 2015, 200 (5.) Match List-I with List-II List-I (Parameter) List-II (Unit) A. Cell constant 1. 2 1 S cm mol− B. Molar conductivity 2. Dimension less C. Conductivity 3. 1 m−
D. Degree of dissociation of electrolyte 4 1 Sm− Choose the most appropriate answer from th options given below A B C D (a.) 3 1 4 2 (b.) 3 1 2 4 (c.) 1 4 3 2 (d.) 2 1 3 2 [JEE Main 2021, 31 Aug Shift-II (6.) For a A + B products the rate of the reaction is given by   2 Rate K A B = [ ] . The units of rate constant (K ) will be (a.) 1 1 molL S − − (b.) 1 1 Lmol S − − (c.) 2 2 1 mol L S − − (d.) 2 2 1 mol L S − − AP EAPCET 20.08.2021 Shift-II (7.) The value of which of the following unit of concentration will not change with the change in temperature? (a.) Molarity (b.) Molality (c.) Normality (d.) Formality GUJCET-2019 (8.) Which of the following is the correct unit of angular momentum of an electron in an orbital of an atom? (a.) J s − (b.) J / s (c.) W / s2 (d.) Ws (e.) 2 Js Kerala-CEE-2019 (9.) The SI unit of electrochemical equivalent is
(a.) 1 Js− (b.) 1 kgC− (c.) 2 kgms− (d.) 1 2 kgm s − − MHT CET-03.05.2019, SHIFT-I (10.) The absolute zero temperature is 0 Kelvin. In C unit which one of the following is the absolute zero temperature? (a.) 0C (b.) −100 C (c.) −273.15 C (d.) −173.15 C NDA (II)-2018 (11.) What is the SI unit of density? (a.) 3 gcm− (b.) 3 gm− (c.) 3 kgm− (d.) 3 kgcm− MHT CET-2018 (12.) Which symbol replaces the unit of atomic mass, amu? (a.) u (b.) A (c.) M (d.) n MHT CET-2018 (13.) Which one of the following statements is not correct? (a.) The hydration enthalpies of alkali metal ions decrease down the group (b.) Lithium halides are some what covalent in nature (c.) Alkali metals react with water liberating oxygen gas (d.) KO2 is paramagnetic (14.) Which of the following has the dimension if 0 2 ML −     T ? (a.) Coefficient of viscosity (b.) Surface tension (c.) Vapour pressure (d.) Kinetic energy
WB-JEE-2017 (15.) Which one of the following is not a unit of energy? (a.) lit-atm (b.) 2 2 kgm s− (c.) Nm (d.) kg.ms 2 m − UPTU/UPSEE-2016 (16.) Consider following unit values of energy I. 1 Ltm II. 1erg III. 1J IV. 1 kcal Increasing order of these values is- (a.) I = II = III = IV (b.) I  II  III  IV (c.) II  III  I  IV (d.) IV  I  III  II BCECE-2013 (17.) Dimension of universal gas constant (R) is (a.) 1 1 VPT n − −     (b.) 1 1 VP Tn − −     (c.) 1 VPTn −     (d.) 1 VPT n −     J & K CET-(2012) (18.) Which of the following represents the smallest quantity? (a.) 1230ng (b.) 4 1.230 10 g −  (c.) 6 1.230 10 kg −  (d.) 4 1.230 10 g   UPTU/UPSEE-2011 (19.) How is 0.0120 written as a scientific notation? (a.) 4 120 10−  (b.) 2 1.2 10−  (c.) 3 12 10− 