ECAT Chemistry Online Test With Answers

image
image
image

ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following is not the reactions of lithium
2 Gypsum is a common mineral of Magnesium Strontium Calcium Barium
3 Borax is a common mineral of alkali metal sodium. Its formula is Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub> Na<sub>2</sub>,B<sub>4</sub>O<sub>7</sub>. 10H<sub>2</sub>O Na<sub>2</sub>B<sub>3</sub>O<sub>6</sub>. 10H<sub>2</sub>O Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>- 5H<sub>2</sub>O
4 Which of the following is lighter Li k Na Ca
5 The alkaline earth elements have in their s-orbital One electron Two electron No electron Three electron
6 Which of the element is not an alkaline earth metal Beryllium Strontium Barium Caesium
7 Which of the element is not alkali metal Lithium Rubidium Francium Magnesium
8 From left to right, atomic radii of transition elements Increases Decreases Remain same None of the above
9 The coinage metals are Ni, Pd, Pt Cu, Ag, Au Zn, Al, Pb Fe, Si, Sn
10 Which is the most volatile compound Hl HCl HBr HF
11 Mark the correct statement Na<sup>+ </sup>is smaller than Na atom Na<sup>+</sup>is larger than Na atom Cl<sup>-</sup>is the smaller than Cl atom Cl<sup>-</sup>(ion) and Cl (atom) are equal in size
12 Keeping in view the size of atoms, which order is the correct one Mg &gt; Sr Ba &gt; Mg Lu &gt; Ce Cl &gt; l
13 The valency, ionization energy and electrongativity of elements are related to its Atomic number Properties Atomic weight Family group
14 Which of the following has highest oxidation potential Be Li Na Ca
15 The valence shell of hydrogen is half filled like those of IV - A VIA V - A VIIA
16 Which of the following statement about electron affinity of two elements is correct Carbon has greater than oxygen Sulphur has less than oxygen Iodine has greater than bromine Bromine has less than chlorine
17 The structure of complex hydrides is Tetrahedal Trigonal Octahedral Square planar
18 For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally Increases Remains constant Decreases Not clear
19 The elements of f-block are also known as Inner-transition Outer transition Normal elements Alkaline earth metals
20 Elements in the same family have Same atomic number Molecular wt same Same chemical properties Same electronic configuration
21 According to the periodic law, the chemical properties of the elements are periodic functions of their Density Atomic number Atomic mass Mass number
22 Which is not interstitial hydride LaH VH TaH None
23 In a group form top to bottom, the hardness of alkali metals Remains unchanged Increases Decreases None
24 Which has highest 1st I.E. Br Cl F l
25 Each vertical column of the periodic table includes elements with chemical characteristics that are in general Identical Similar Different Similar as well as different
26 Which element should have the greatest value for electronegativity when combined with hydrogen Na Si S Cl
27 Which of the following elements have the largest radius F Cl Br l
28 Which of the following elements should be the least metallic in character Rb ln Te l
29 Gradation in properties in the periods of periodic tables are due to change in Atomic weight The number of electrons Number of protons Electronic configuration
30 The most distinctive character among the elements is their division into Metals and non-metals Solids, liquids and gases Atoms and molecules Active and inactive elements
Download This Set
×