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romiroy12
romiroy12
@romiroy12
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Joined: Oct 18, 2020
Last seen: Jul 3, 2023
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Topics: 2049 / Replies: 0
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Topic
The contraction and expansion movement of the walls of the food pipe is called:
5 years ago
Forum
Life Processes
Replies: 0
Views: 2780
Topic
Which region of the alimentary canal absorbs the digested food?
5 years ago
Forum
Life Processes
Replies: 0
Views: 1603
Topic
Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
5 years ago
Forum
Life Processes
Replies: 0
Views: 673
Topic
In amoeba, food is digested in the: (a) food vacuole (b) mitochondria (c) pseudopodia (d) chloroplast
5 years ago
Forum
Life Processes
Replies: 0
Views: 1421
Topic
The site of photosynthesis in the cells of a leaf is (a) chloroplast (b) mitochondria (c) cytoplasm (d) protoplasm
5 years ago
Forum
Life Processes
Replies: 0
Views: 389
Topic
Roots of the plants absorb water from the soil through the process of: (a) diffusion (b) transpiration (c) osmosis (d) None of these
5 years ago
Forum
Life Processes
Replies: 0
Views: 463
Topic
The mode of nutrition found in fungi is:
5 years ago
Forum
Life Processes
Replies: 0
Views: 803
Topic
In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?
5 years ago
Forum
Life Processes
Replies: 0
Views: 498
Topic
Which of the following are energy foods? (a) Carbohydrates and fats (b) Proteins and mineral salts (c) Vitamins and minerals (d) Water and roughage
5 years ago
Forum
Life Processes
Replies: 1
Views: 9032
Topic
An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 211
Topic
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 191
Topic
Atomic number of a few elements are given below. 10, 20, 7, 14 (a) Identify the elements. (b) Identify the Group number of these elements in the Periodic Table.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 333
Topic
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide. (a) Where in the periodic table are elements X and Y placed? (b) Classify X and Y as metal(s), non-metal(s) or metalloid(s).
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 169
Topic
An element is placed in 2nd Group and 3rd Period of the Periodic Table, burns in presence of oxygen to form a basic oxide, (a) Identify the element. (b) Write the electronic configuration. (c) Write the balanced equation when it burns in the prese...
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 183
Topic
Arrange the following elements in the increasing order of their metallic character. Mg, Ca, K, Ge, Ga.
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 161
Topic
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 160
Topic
Identify and name the metals out of the following elements whose electronic configurations are given below. (a) 2, 8, 2 (b) 2, 8. 1 (c) 2.8. 7 (d) 2. 1
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 132
Topic
Arrange the following elements in increasing order of their atomic radii (a) Li, Be, F, N (b) Cl, At, Br, I
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 215
Topic
Compare the radii of two species X and Y. Give reasons for your answer. (a) X has 12 protons and 12 electrons (b) Y has 12 protons and 10 electrons
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 278
Topic
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
5 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 135
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