Q. A 1.5 m tall person is standing at a distance of 3 m from a lamp post. The light from the lamp at the top of the post casts her shadow. The length of the shadow is twice her height. What is the height of the lamp post in meters? (A) 1.5 (B) 3 […]
A 1.5 m tall person is standing at a distance of 3 m from a lamp post Read More »
Q. “Even though there is a vast scope for its_______, tourism has remained a/an__________area.” The words that best fill the blanks in the above sentence are (A) improvement, neglected (B) rejection, approved (C) fame, glum (D) interest, disinterested Ans: Improvement, neglected
Q. “By giving him the last_______of the cake, you will ensure lasting_______in our house today.” The words that best fill the blanks in the above sentence are (A) peas, piece (B) piece, peace (C) peace, piece (D) peace, peas Ans: piece, peace
Q. A tetrapeptide, made up of natural amino acids, has alanine as the N-terminal residue which is coupled to a chiral amino acid. Upon complete hydrolysis, the tetrapeptide gives glycine, alanine, phenylalanine and leucine. The number of possible sequences of the tetrapeptide is . Ans: 4.0 to 4.0
Q. The absorption maxima of two dyes X and Y are 520 and 460 nm, respectively. The absorbance data of these dyes measured in a 1 cm path length cell are given in the table below. Dye solution Absorbance at 460 nm Absorbance at 520 nm X (9 mM) 0.144 0.765 Y (12 mM) 0.912
Q. The Latimer diagram of oxygen is given below. The value of x is__________V. (Up to two decimal places) Ans: 1.22 to 1.24
The Latimer diagram of oxygen is given below. The value of x is__________V Read More »
Q. The reaction of equimolar quantities of Fe(CO)5 and OH– gives a complex species X which on further reaction with MnO2 gives species Y. X and Y, respectively, are (A) [Fe(CO)5(OH)]– and Fe2(CO)9 (B) [Fe(CO)4]2– and Mn2(CO)10 (C) [HFe(CO)4]– and Fe2O3 (D) [HFe(CO)4]– and Fe3(CO)12 Ans: [HFe(CO)4]- and Fe3(CO)12
Q. The reaction of PCl3 with PhLi in 1:3 molar ratio yields X as one of the products, which on further treatment with CH3I gives Y. The reaction of Y with n-BuLi gives product Z. The products X, Y and Z, respectively, are (A) [PPh4]Cl, [Ph2P=CH2] and Ph2P(n-Bu) (B) PPh3, [Ph3PI](CH3) and Ph2P(n-Bu)3 (C) PPh3,
The reaction of PCl3 with PhLi in 1:3 molar ratio yields X as one of the products Read More »
Q. For an inverse spinel, AB2O4, the A and B, respectively, can be (A) Ni(II) and Ga(III) (B) Zn(II) and Fe(III) (C) Fe(II) and Cr(III) (D) Mn(II) and Mn(III) Ans: Ni(II) and Ga(III)
For an inverse spinel, AB2O4, the A and B, respectively, can be Read More »
![Second-order rate constant for the reaction between [Co(NH3)5X]n+ (n = 3 for X = NH3 and H2O](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Second-order-rate-constant-for-the-reaction-between-CoNH35Xn-n-3-for-X-NH3-and-H2O-1024x536.jpg)
Q. Second-order rate constant for the reaction between [Co(NH3)5X]n+ (n = 3 for X = NH3 and H2O; n = 2 for X = Cl–) and [Cr(H2O)6]2+ at room temperature varies with the X as (A) NH3 > H2O > Cl– (B) Cl– > H2O > NH3 (C) NH3 > Cl– > H2O (D) H2O >
