Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :(a) copper and sulphur (b) sulphur and iron(c) phosphorus and nitrogen (d) nitrogen and iron
Correct Answer: (d) nitrogen and iron
Explanation: Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be nitrogen and iron.
Related Articles
- The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :(a) 1 and 3 (b) 3 and 1 (c) 2 and 3 (d) 3 and 2
- Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :(a) sulphur and krypton (b) krypton and ozone (c) phosphorus and sulphur (d) krypton and sulphur
- If \( x=a, y=b \) is the solution of the equations \( x-y=2 \) and \( x+y=4 \), then the values of \( a \) and \( b \) are, respectively(A) 3 and 5(B) 5 and 3(C) 3 and 1,b>(D) \( -1 \) and \( -3 \)
- Add the following algebraic expressions.a) \( x+5 \) and \( x+3 \)b) \( 3 x+4 \) and \( 4 x+9 \)c) \( 5 y-2 \) and \( 2 y+7 \) d) \( 8 y-3 \) and \( 5 y-6 \)
- The atomicities of ozone, sulphur, phosphorus and argon are respectively :(a) 8, 3, 4 and 1 (b) 1, 3, 4 and 8 (c) 4, 1, 8 and 3 (d) 3, 8, 4 and 1
- An element which can exhibit valencies of 2, 4, and 6 can be :(a) copper (b) iron (c) mercury (d) sulphur
- Two solutions X and Y were found to have pH value of 4 and 10 respectively. The inference that can be drawn is(a) X is a base and Y is an acid(b) Both X and Y are acidic solutions(c) X is an acid and Yis a base(d) Both X and Y are bases
- Four elements W, X, Y and Z contain 8, 11, 9 and 17 protons per atom respectively. The element which cannot form an anion is most likely to be :(a) W (b) X (c) Y (d) Z
- $( x-2)$ is a common factor of $x^{3}-4 x^{2}+a x+b$ and $x^{3}-a x^{2}+b x+8$, then the values of $a$ and $b$ are respectively.
- If $x+y=5$ and $xy=6$ then find $x^3+y^3$.
- Maximize the sum of X+Y elements by picking X and Y elements from 1st and 2nd array in C++
- The atoms of which of the following pair of elements are most likely to exist in free state ?(a) hydrogen and helium (b) argon and carbon (c) neon and nitrogen (d) helium and neon
- Express the following linear equations in the form \( a x+b y+c=0 \) and indicate the values of \( a, b \) and \( c \) in each case:(i) \( 2 x+3 y=9.3 \overline{5} \)(ii) \( x-\frac{y}{5}-10=0 \)(iii) \( -2 x+3 y=6 \)(iv) \( x=3 y \)(v) \( 2 x=-5 y \)(vi) \( 3 x+2=0 \)(vii) \( y-2=0 \)(viii) \( 5=2 x \)
- If \( 2 x+y=23 \) and \( 4 x-y=19 \), find the values of \( 5 y-2 x \) and \( \frac{y}{x}-2 \).
- If $(1, 2), (4, y), (x, 6)$ and $(3, 5)$ are the vertices of a parallelogram taken in order, find $x$ and $y$.
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies