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Q. Define the Normality of solutions?
Ans. Sometime normality is used to measure concentration. Normality (abbreviated N) is the number of gram-equivalent masses of solute in 1 liter of solution. A gram-equivalent mass is the mass of acid (or base) which can give one mole of hydrogen (or hydroxide) ions.
what will be presure if tempreture is -73?
1s 2 , 2s 2 , 2p 6 3s 1 shows configuration of: (1) Al 3+ in ground state (2) Ne in excited state (3) Mg + in excited state (4) None of these Ans: Mg + in
Q. Determine the wavelength of light wave? Ans. The frequency of an infrared wave is 2.07 x 10 14 Hz. What is the wavelength? c = λv Since we know the speed of light we
Q. What is Base units? There are seven base units given in SI. A base unit is a unit of calculate that is based on an object or event in the physical world. Lists of the seve
The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is: (1) Eight (2) Six (3) Three
Explain in detail about the Allotropy Allotropy refers only to dissimilar forms of an element within the similar phase or state of matter (i.e. different solid, liquid or gas
brief notes &uses
The electronic configuration of gadolinium (atomic no. 64) is: (1) [Xe]4s 8 5d 9 6s 2 (2) [Xe] 4s 1 5d 1 6s 2 (3) [Xe]4s 3 5d
The number of unpaired electrons in Fe 3+ (Z= 26) are: (1) 5 (2) 6 (3) 3 (4) 4 Ans: 5
0.47 moles of Sodium were reacted with 26g of Copper(II) Nitrate? If the actual yield of copper metal was 1.43g, what is the percentage yield of this reaction? 2. What is the equiv
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