1. Light year is the unit of what?
A. distanceB. timeC. velocityD. energy
2. How many neutrons is present in one molecule of? NaAl(OH)4 [Na (Z = 11, A = 23); Al (Z = 13, A = 27); O (Z = 8, A = 16); H (Z = 1, A = 1)]
A. 34B. 36C. 62D. 58 NNa = 12; NAl = 14; NO = 8 NH = 0 Ntotal = 12 + 14 + (8 + 0) × 4 = 58
3. What is the correct value of? lim x→∞ 4+3x−x2 7+2x+3x2
A. 4 7B. − 3 2C. − 1 3D. 1 3 x2 = − 1 3
4. Through which medium hormone, enzyme and lipid circulate to organs?
A. Red blood corpusclesB. White blood corpusclesC. Blood PlasmaD. Platelets
5. The 2 Period elements of the periodic table are referred to as-nd
A. Normal elementsB. Noble gasesC. Transition elementsD. Rare earth elements nd rd
6. What is the electronic configuration of Cr?
A. 1s22s12p63s23p63d54s2B. 1s12s22p63s23p63d54s2C. 1s22s22p63s23p63d54s1D. 1s22s22p63s63p23d54s1